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Paradezhenko GV, Prodan DV, Pervishko AA, Yudin D, Allagui A. Fractional Marcus-Hush-Chidsey-Yakopcic current-voltage model for redox-based resistive memory devices. Phys Chem Chem Phys 2023; 26:621-627. [PMID: 38086639 DOI: 10.1039/d3cp04177h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2023]
Abstract
We propose a circuit-level model combining the Marcus-Hush-Chidsey electron current equation and the Yakopcic equation for the state variable for describing resistive switching memory devices of the structure metal-ionic conductor-metal. We extend the dynamics of the state variable originally described by a first-order time derivative by introducing a fractional derivative with an arbitrary order between zero and one. We show that the extended model fits with great fidelity the current-voltage characteristic data obtained on a Si electrochemical metallization memory device with Ag-Cu alloy.
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Affiliation(s)
- G V Paradezhenko
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia.
| | - D V Prodan
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia.
| | - A A Pervishko
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia.
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, Vladivostok 690922, Russia
| | - D Yudin
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia.
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, Vladivostok 690922, Russia
| | - A Allagui
- Department of Sustainable and Renewable Energy Engineering, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
- Department of Mechanical and Materials Engineering, Florida International University, Miami, FL 33174, USA
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2
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Prodan DV, Paradezhenko GV, Yudin D, Pervishko AA. An ab initio approach to anisotropic alloying into the Si(001) surface. Phys Chem Chem Phys 2023; 25:5501-5509. [PMID: 36723199 DOI: 10.1039/d2cp04405f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
By employing density functional theory calculations, we explore the initial stage of competitive alloying of co-deposited silver and indium atoms into a silicon surface. In particular, we identify respective adsorption positions and activation barriers governing their diffusion on a dimer-reconstructed silicon surface. Furthermore, we develop a growth model that appropriately describes diffusion mechanisms and silicon morphology with the account of silicon dimerization and the presence of C-type defects. Based on the surface kinetic Monte Carlo simulations, we examine the dynamics of bimetallic adsorption and elaborate on the temperature effects on the submonolayer growth of an Ag-In alloy. A close inspection of adatom migration clearly indicates effective nucleation of Ag and In atoms, followed by the formation of orthogonal atomic chains. We show that the epitaxial bimetallic growth might potentially lead to exotic ordering of adatoms in the form of anisotropic two-dimensional lattices via orthogonally oriented single-metal rows. We argue that this scenario becomes favorable provided above room temperature, while our numerical results are shown to be in agreement with the experimental findings.
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Affiliation(s)
- D V Prodan
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia.
| | - G V Paradezhenko
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia.
| | - D Yudin
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia.
| | - A A Pervishko
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia.
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3
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Paradezhenko GV, Pervishko AA, Swain N, Sengupta P, Yudin D. Spin-hedgehog-derived electromagnetic effects in itinerant magnets. Phys Chem Chem Phys 2022; 24:24317-24322. [PMID: 36173187 DOI: 10.1039/d2cp03486g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In itinerant magnets, the indirect exchange coupling of Ruderman-Kittel-Kasuya-Yosida type is known to stabilize incommensurate spin spirals, whereas an account of higher order spin interactions favors the formation of a noncoplanar magnetic texture. This is manifested by the finite Berry phase the conduction electrons accumulate when their spins follow this texture, leading thus to the topological Hall effect. We herein utilize the effective spin model with bilinear-biquadratic exchange interactions for studying the formation of the magnetic hedgehog lattice, that represents a periodic array of magnetic anti- and monopoles and has been recently observed in the B20-type compounds, in a three-dimensional itinerant magnet. As opposed to widely used Monte Carlo simulations, we employ a neural-network-based approach for exploring the ground state spin configuration in a noncentrosymmetric crystal structure. Further, we address the topological Hall conductivity, associated with nonzero scalar spin chirality, in the itinerant magnet due to the coupling to the spin hedgehog lattice, and provide the evidence of a magneto-optic Kerr effect.
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Affiliation(s)
- G V Paradezhenko
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia.
| | - A A Pervishko
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia.
| | - N Swain
- MajuLab, CNRS-UCA-SU-NUS-NTU International Joint Research Unit IRL, 3654, Singapore.,Centre for Quantum Technologies, National University of Singapore, 117543, Singapore
| | - P Sengupta
- School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
| | - D Yudin
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia.
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4
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Samardak AS, Ognev AV, Kolesnikov AG, Stebliy ME, Samardak VY, Iliushin IG, Pervishko AA, Yudin D, Platunov M, Ono T, Wilhelm F, Rogalev A. XMCD and ab initio study of interface-engineered ultrathin Ru/Co/W/Ru films with perpendicular magnetic anisotropy and strong Dzyaloshinskii-Moriya interaction. Phys Chem Chem Phys 2022; 24:8225-8232. [PMID: 35319030 DOI: 10.1039/d1cp05456b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Understanding the nature of recently discovered spin-orbital induced phenomena and a definition of a general approach for "ferromagnet/heavy-metal" layered systems to enhance and manipulate spin-orbit coupling, spin-orbit torque, and the Dzyaloshinskii-Moriya interaction (DMI) assisted by atomic-scale interface engineering are essential for developing spintronics and spin-orbitronics. Here, we exploit X-ray magnetic circular dichroism (XMCD) spectroscopy at the L2,3-edges of 5d and 4d non-magnetic heavy metals (W and Ru, respectively) in ultrathin Ru/Co/W/Ru films to determine their induced magnetic moments due to the proximity to the ferromagnetic layer of Co. The deduced orbital and spin magnetic moments agree well with the theoretically predicted values, highlighting the drastic effect of constituting layers on the system's magnetic properties and the strong interfacial DMI in Ru/Co/W/Ru films. As a result, we demonstrate the ability to simultaneously control the strength of magnetic anisotropy and intermixing-enhanced DMI through the interface engineered inversion asymmetry in thin-film chiral ferromagnets, which are a potential host for stable magnetic skyrmions.
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Affiliation(s)
- Alexander S Samardak
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Russia.
| | - Alexey V Ognev
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Russia.
| | - Alexander G Kolesnikov
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Russia.
| | - Maksim E Stebliy
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Russia.
| | - Vadim Yu Samardak
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Russia.
| | - Ilia G Iliushin
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Russia.
| | | | - Dmitry Yudin
- Skolkovo Institute of Science and Technology, 121205 Moscow, Russia
| | - Mikhail Platunov
- Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia.,Synchrotron radiation facility SKIF, Boreskov Institute of Catalysis SB RAS, 630559 Kol'tsovo, Russia.
| | - Teruo Ono
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Russia. .,Institute for Chemical Research, Kyoto University, Uji, Kyoto, Japan
| | - Fabrice Wilhelm
- ESRF-The European Synchrotron, 38043 Grenoble Cedex 9, France
| | - Andrey Rogalev
- ESRF-The European Synchrotron, 38043 Grenoble Cedex 9, France
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5
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Abstract
In this paper, we provide a comprehensive theoretical analysis of the electronic structure of InAs(111) surfaces with special attention paid to the energy region close to the fundamental bandgap. Starting from the bulk electronic structure of InAs calculated using the PBE functional with the inclusion of Hubbard correction and spin-orbit coupling, we derive proper values for the bandgap, split-off energy, as well as effective electron, light-hole and heavy-hole masses in full consistent with the available experimental results. Besides that we address the projected density of states associated with p orbitals of bulk indium and arsenic atoms. On the basis of optimized atomic surfaces we recover scanning tunneling microscopy images and calculate the band structure and orbital distributions of surface atoms, which along with accessible experimental data make it possible to speculate on the formation of the electron accumulation layer for both As- and In-terminated InAs(111) surfaces. Moreover, these results are accompanied by charge density distribution simulations.
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Affiliation(s)
- Ivan I Vrubel
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia.
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6
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Maevskaya J, Laktionov K, Yudin D, Vladimirova L. 408P Integrated chemotherapy with EGFR receptor tyrosine kinase inhibitors in patients with non-small cell lung cancer harboring EGFR mutation. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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7
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Pervishko AA, Yudin D, Kumar Gudelli V, Delin A, Eriksson O, Guo GY. Localized surface electromagnetic waves in CrI 3-based magnetophotonic structures. Opt Express 2020; 28:29155-29165. [PMID: 33114820 DOI: 10.1364/oe.394113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 08/05/2020] [Indexed: 06/11/2023]
Abstract
Resulting from strong magnetic anisotropy two-dimensional ferromagnetism was recently shown to be stabilized in chromium triiodide, CrI3, in the monolayer limit. While its properties remain largely unexplored, it provides a unique material-specific platform to unveil its electromagnetic properties associated with coupling of modes. Indeed, trigonal symmetry in the presence of out-of-plane magnetization results in a non-trivial structure of the conductivity tensor, including the off-diagonal terms. In this paper, we study the surface electromagnetic waves localized in a CrI3-based structure using the results of ab initio calculations for the CrI3 conductivity tensor. In particular, we provide an estimate for the critical angle corresponding to the surface plasmon polariton generation in the Kretschmann-Raether configuration by a detailed investigation of reflectance spectrum as well as the magnetic field distribution for different CrI3 layer thicknesses. We also study the bilayer structure formed by two CrI3 layers separated by a SiO2 spacer and show that the surface plasmon resonance can be achieved at the interface between CrI3 and air depending on the spacer thickness.
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8
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Geffen Y, Perets N, Horev R, Yudin D, Oron O, Elliott E, Marom E, Danon U, Offen D. Exosomes derived from adipose mesenchymal stem cells: a potential non-invasive intranasal treatment for autism. Cytotherapy 2020. [DOI: 10.1016/j.jcyt.2020.03.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Vrubel II, Pervishko AA, Yudin D, Sanyal B, Eriksson O, Rodnyi PA. Oxygen vacancy in ZnO- w phase: pseudohybrid Hubbard density functional study. J Phys Condens Matter 2020; 32:315503. [PMID: 32224510 DOI: 10.1088/1361-648x/ab849d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The study of zinc oxide, within the homogeneous electron gas approximation, results in overhybridization of zinc 3d shell with oxygen 2p shell, a problem shown for most transition metal chalcogenides. This problem can be partially overcome by using LDA + U (or, GGA + U) methodology. However, in contrast to the zinc 3d orbital, Hubbard type correction is typically excluded for the oxygen 2p orbital. In this work, we provide results of electronic structure calculations of an oxygen vacancy in ZnO supercell from ab initio perspective, with two Hubbard type corrections, U Zn-3d and U O-2p. The results of our numerical simulations clearly reveal that the account of U O-2p has a significant impact on the properties of bulk ZnO, in particular the relaxed lattice constants, effective mass of charge carriers as well as the bandgap. For a set of validated values of U Zn-3d and U O-2p we demonstrate the appearance of a localized state associated with the oxygen vacancy positioned in the bandgap of the ZnO supercell. Our numerical findings suggest that the defect state is characterized by the highest overlap with the conduction band states as obtained in the calculations with no Hubbard-type correction included. We argue that the electronic density of the defect state is primarily determined by Zn atoms closest to the vacancy.
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Affiliation(s)
- Ivan I Vrubel
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia
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10
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Kolodny S, Yudin D, Iorsh I. Resonant spin wave excitation in magnetoplasmonic bilayers using short laser pulses. Nanoscale 2019; 11:2003-2007. [PMID: 30644961 DOI: 10.1039/c8nr09989h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In magnetically ordered solids a static magnetic field can be generated by virtue of the transverse magneto-optical Kerr effect (TMOKE). Moreover, the latter was shown to be dramatically enhanced due to the optical excitation of surface plasmons in nanostructures with relatively small optical losses. In this paper we suggest a new method for resonant optical excitation in a prototypical bilayer composed of a noble metal (Au) with grating and a ferromagnetic thin film of yttrium iron garnet (YIG) via a frequency comb. Based on magnetization dynamics simulations we show that for a frequency comb with certain parameters, chosen to be resonant with the spin-wave excitations of YIG, the TMOKE is drastically enhanced, hinting at possible technological applications in optical control of spintronics systems.
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11
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Koumpouras K, Yudin D, Adelmann C, Bergman A, Eriksson O, Pereiro M. A majority gate with chiral magnetic solitons. J Phys Condens Matter 2018; 30:375801. [PMID: 30079893 DOI: 10.1088/1361-648x/aad82f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In magnetic materials, nontrivial spin textures may emerge due to the competition among different types of magnetic interactions. Among such spin textures, chiral magnetic solitons represent topologically protected spin configurations with particle-like properties. Based on atomistic spin dynamics simulations, we demonstrate that these chiral magnetic solitons are ideal to use for logical operations, and we demonstrate the functionality of a three-input majority gate, in which the input states can be controlled by applying an external electromagnetic field or spin-polarized currents. One of the main advantages of the proposed device is that the input and output signals are encoded in the chirality of solitons, that may be moved, allowing to perform logical operations using only minute electric currents. As an example we illustrate how the three input majority gate can be used to perform logical relations, such as Boolean AND and OR.
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Affiliation(s)
- Konstantinos Koumpouras
- Applied Physics, Division of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology, SE-971 87, Luleå, Sweden
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12
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Grynspan F, Bleich Kimelman N, Yudin D, Yitzhaki I, Marom E. Synergistic effect of human adipose derived mesenchymal cells (ADSC) and glatiramer acetate long acting injection (GA depot) on MOG-induced chronic eae in C57bl/6 mice. Cytotherapy 2018. [DOI: 10.1016/j.jcyt.2018.02.097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Yudin D, Gulevich DR, Titov M. Light-Induced Anisotropic Skyrmion and Stripe Phases in a Rashba Ferromagnet. Phys Rev Lett 2017; 119:147202. [PMID: 29053307 DOI: 10.1103/physrevlett.119.147202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Indexed: 06/07/2023]
Abstract
An external off-resonant pumping is proposed as a tool to control the Dzyaloshinskii-Moriya interaction (DMI) in ferromagnetic layers with strong spin-orbit coupling. Combining theoretical analysis with numerical simulations for an s-d-like model, we demonstrate that linearly polarized off-resonant light may help stabilize novel noncollinear magnetic phases by inducing a strong anisotropy of the DMI. We also investigate how with the application of electromagnetic pumping one can control the stability, shape, and size of individual Skyrmions to make them suitable for potential applications.
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Affiliation(s)
- Dmitry Yudin
- ITMO University, Saint Petersburg 197101, Russia
| | | | - Mikhail Titov
- ITMO University, Saint Petersburg 197101, Russia
- Radboud University Nijmegen, Institute for Molecules and Materials, NL-6525 AJ Nijmegen, The Netherlands
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14
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Perry RBT, Rishal I, Doron-Mandel E, Kalinski AL, Medzihradszky KF, Terenzio M, Alber S, Koley S, Lin A, Rozenbaum M, Yudin D, Sahoo PK, Gomes C, Shinder V, Geraisy W, Huebner EA, Woolf CJ, Yaron A, Burlingame AL, Twiss JL, Fainzilber M. Nucleolin-Mediated RNA Localization Regulates Neuron Growth and Cycling Cell Size. Cell Rep 2016; 16:1664-1676. [PMID: 27477284 PMCID: PMC4978702 DOI: 10.1016/j.celrep.2016.07.005] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 01/23/2016] [Accepted: 07/04/2016] [Indexed: 12/22/2022] Open
Abstract
How can cells sense their own size to coordinate biosynthesis and metabolism with their growth needs? We recently proposed a motor-dependent bidirectional transport mechanism for axon length and cell size sensing, but the nature of the motor-transported size signals remained elusive. Here, we show that motor-dependent mRNA localization regulates neuronal growth and cycling cell size. We found that the RNA-binding protein nucleolin is associated with importin β1 mRNA in axons. Perturbation of nucleolin association with kinesins reduces its levels in axons, with a concomitant reduction in axonal importin β1 mRNA and protein levels. Strikingly, subcellular sequestration of nucleolin or importin β1 enhances axonal growth and causes a subcellular shift in protein synthesis. Similar findings were obtained in fibroblasts. Thus, subcellular mRNA localization regulates size and growth in both neurons and cycling cells.
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Affiliation(s)
- Rotem Ben-Tov Perry
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Ida Rishal
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Ella Doron-Mandel
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Ashley L Kalinski
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA
| | - Katalin F Medzihradszky
- Mass Spectrometry Facility, Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Marco Terenzio
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Stefanie Alber
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Sandip Koley
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Albina Lin
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Meir Rozenbaum
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Dmitry Yudin
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Pabitra K Sahoo
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA
| | - Cynthia Gomes
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA
| | - Vera Shinder
- Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | | | - Eric A Huebner
- F.M. Kirby Neurobiology Center, Boston Children's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Clifford J Woolf
- F.M. Kirby Neurobiology Center, Boston Children's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Avraham Yaron
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Alma L Burlingame
- Mass Spectrometry Facility, Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Jeffery L Twiss
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA
| | - Mike Fainzilber
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel.
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15
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Abstract
In magnetic materials a variety of non-collinear ground state configurations may emerge as a result of competition among exchange, anisotropy, and dipole-dipole interaction, yielding magnetic states far more complex than those of homogenous ferromagnets. Of particular interest in this study are particle-like configurations. These particle-like states, e.g., magnetic solitons, skyrmions, or domain walls, form a spatially localised clot of magnetic energy. In this paper we address topologically protected magnetic solitons and explore concepts that potentially might be relevant for logical operations and/or information storage in the rapidly advancing filed of solitonics (and skyrmionics). An ability to easily create, address, and manipulate such structures is among the prerequisite forming a basis of "-onics technology", and is investigated in detail here using numerical and analytical tools.
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Affiliation(s)
- Konstantinos Koumpouras
- Department of Physics and Astronomy, Uppsala University, P.O. Box 516, 751 20 Uppsala, Sweden
| | - Anders Bergman
- Department of Physics and Astronomy, Uppsala University, P.O. Box 516, 751 20 Uppsala, Sweden
| | - Olle Eriksson
- Department of Physics and Astronomy, Uppsala University, P.O. Box 516, 751 20 Uppsala, Sweden
| | - Dmitry Yudin
- ITMO University, Saint Petersburg 197101, Russia
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16
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Pereiro M, Yudin D, Chico J, Etz C, Eriksson O, Bergman A. Erratum: Corrigendum: Topological excitations in a kagome magnet. Nat Commun 2015; 6:7881. [DOI: 10.1038/ncomms8881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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17
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Pereiro M, Yudin D, Chico J, Etz C, Eriksson O, Bergman A. Topological excitations in a kagome magnet. Nat Commun 2014; 5:4815. [DOI: 10.1038/ncomms5815] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 07/25/2014] [Indexed: 11/09/2022] Open
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18
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Yudin D, Hirschmeier D, Hafermann H, Eriksson O, Lichtenstein AI, Katsnelson MI. Fermi condensation near van Hove singularities within the Hubbard model on the triangular lattice. Phys Rev Lett 2014; 112:070403. [PMID: 24579572 DOI: 10.1103/physrevlett.112.070403] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Indexed: 06/03/2023]
Abstract
The proximity of the Fermi surface to van Hove singularities drastically enhances interaction effects and leads to essentially new physics. In this work we address the formation of flat bands ("Fermi condensation") within the Hubbard model on the triangular lattice and provide a detailed analysis from an analytical and numerical perspective. To describe the effect we consider both weak-coupling and strong-coupling approaches, namely the renormalization group and dual fermion methods. It is shown that the band flattening is driven by correlations and is well pronounced even at sufficiently high temperatures, of the order of 0.1-0.2 of the hopping parameter. The effect can therefore be probed in experiments with ultracold fermions in optical lattices.
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Affiliation(s)
- Dmitry Yudin
- Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
| | - Daniel Hirschmeier
- Institut für Theoretische Physik, Universität Hamburg, Jungiusstraße 9, D-20355 Hamburg, Germany
| | - Hartmut Hafermann
- Institut de Physique Théorique (IPhT), CEA, CNRS, 91191 Gif-sur-Yvette, France
| | - Olle Eriksson
- Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
| | - Alexander I Lichtenstein
- Institut für Theoretische Physik, Universität Hamburg, Jungiusstraße 9, D-20355 Hamburg, Germany
| | - Mikhail I Katsnelson
- Institute for Molecules and Materials, Radboud University Nijmegen, Heijendaalseweg 135, NL-6525 AJ Nijmegen, The Netherlands and Department of Theoretical Physics and Applied Mathematics, Ural Federal University, Mira Street 19, 620002 Ekaterinburg, Russia
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19
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Ben-Yaakov K, Dagan SY, Segal-Ruder Y, Shalem O, Vuppalanchi D, Willis DE, Yudin D, Rishal I, Rother F, Bader M, Blesch A, Pilpel Y, Twiss JL, Fainzilber M. Axonal transcription factors signal retrogradely in lesioned peripheral nerve. EMBO J 2012; 31:1350-63. [PMID: 22246183 DOI: 10.1038/emboj.2011.494] [Citation(s) in RCA: 212] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Accepted: 12/16/2011] [Indexed: 11/09/2022] Open
Abstract
Retrograde axonal injury signalling stimulates cell body responses in lesioned peripheral neurons. The involvement of importins in retrograde transport suggests that transcription factors (TFs) might be directly involved in axonal injury signalling. Here, we show that multiple TFs are found in axons and associate with dynein in axoplasm from injured nerve. Biochemical and functional validation for one TF family establishes that axonal STAT3 is locally translated and activated upon injury, and is transported retrogradely with dynein and importin α5 to modulate survival of peripheral sensory neurons after injury. Hence, retrograde transport of TFs from axonal lesion sites provides a direct link between axon and nucleus.
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Affiliation(s)
- Keren Ben-Yaakov
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, Israel
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Abstract
The GTPase Ran is best known for its crucial roles in the regulation of nucleocytoplasmic transport in interphase cells and in the organization of the spindle apparatus during mitosis. A flurry of recent reports has now implicated Ran in diverse cytoplasmic events, including trafficking of an ephrin receptor homolog in nematode oocytes, control of neurite outgrowth in Drosophila and mammalian neurons, and retrograde signaling in nerve axons after injury. Striking findings suggest that the guanine-nucleotide state of Ran can be regulated by local translation of the Ran-binding protein RanBP1 in axons, and that an additional Ran-binding protein, RanBP10, can act as a microtubule-binding cytoplasmic guanine-nucleotide exchange factor for Ran (RanGEF) in megakaryocytes. Thus, the Ran GTPase system can act as a spatial regulator of importin-dependent transport and signaling in distal cytoplasm, and as a regulator of cytoskeletal dynamics at sites that are distant from the nucleus.
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Affiliation(s)
- Dmitry Yudin
- Department of Biological Chemistry, Weizmann Institute of Science, 76100 Rehovot, Israel
| | - Mike Fainzilber
- Department of Biological Chemistry, Weizmann Institute of Science, 76100 Rehovot, Israel
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Yudin D, Hanz S, Yoo S, Iavnilovitch E, Willis D, Gradus T, Vuppalanchi D, Segal-Ruder Y, Ben-Yaakov K, Hieda M, Yoneda Y, Twiss JL, Fainzilber M. Localized regulation of axonal RanGTPase controls retrograde injury signaling in peripheral nerve. Neuron 2008; 59:241-52. [PMID: 18667152 DOI: 10.1016/j.neuron.2008.05.029] [Citation(s) in RCA: 182] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2007] [Revised: 05/26/2008] [Accepted: 05/27/2008] [Indexed: 12/30/2022]
Abstract
Peripheral sensory neurons respond to axon injury by activating an importin-dependent retrograde signaling mechanism. How is this mechanism regulated? Here, we show that Ran GTPase and its associated effectors RanBP1 and RanGAP regulate the formation of importin signaling complexes in injured axons. A gradient of nuclear RanGTP versus cytoplasmic RanGDP is thought to be fundamental for the organization of eukaryotic cells. Surprisingly, we find RanGTP in sciatic nerve axoplasm, distant from neuronal cell bodies and nuclei, and in association with dynein and importin-alpha. Following injury, localized translation of RanBP1 stimulates RanGTP dissociation from importins and subsequent hydrolysis, thereby allowing binding of newly synthesized importin-beta to importin-alpha and dynein. Perturbation of RanGTP hydrolysis or RanBP1 blockade at axonal injury sites reduces the neuronal conditioning lesion response. Thus, neurons employ localized mechanisms of Ran regulation to control retrograde injury signaling in peripheral nerve.
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Affiliation(s)
- Dmitry Yudin
- Department of Biological Chemistry, Weizmann Institute of Science, 76100 Rehovot, Israel
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Grynspan F, Landau E, Marikovsky M, Yudin D, Nagler A, Hasson A, Bulvik S. Human bone marrow-derived CD133+ cells can be expanded ex-vivo in the presence of a polyamine copper chelator. Biol Blood Marrow Transplant 2004. [DOI: 10.1016/j.bbmt.2003.12.156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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