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Varade V, Haider G, Slobodeniuk A, Korytar R, Novotny T, Holy V, Miksatko J, Plsek J, Sykora J, Basova M, Zacek M, Hof M, Kalbac M, Vejpravova J. Chiral Light Emission from a Hybrid Magnetic Molecule-Monolayer Transition Metal Dichalcogenide Heterostructure. ACS Nano 2023; 17:2170-2181. [PMID: 36652711 PMCID: PMC10017025 DOI: 10.1021/acsnano.2c08320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 01/13/2023] [Indexed: 06/17/2023]
Abstract
Hybrid layered materials assembled from atomically thin crystals and small molecules bring great promises in pushing the current information and quantum technologies beyond the frontiers. We demonstrate here a class of layered valley-spin hybrid (VSH) materials composed of a monolayer two-dimensional (2D) semiconductor and double-decker single molecule magnets (SMMs). We have materialized a VSH prototype by thermal evaporation of terbium bis-phthalocyanine onto a MoS2 monolayer and revealed its composition and stability by both microscopic and spectroscopic probes. The interaction of the VSH components gives rise to the intersystem crossing of the photogenerated carriers and moderate p-doping of the MoS2 monolayer, as corroborated by the density functional theory calculations. We further explored the valley contrast by helicity-resolved photoluminescence (PL) microspectroscopy carried out down to liquid helium temperatures and in the presence of the external magnetic field. The most striking feature of the VSH is the enhanced A exciton-related valley emission observed at the out-of-resonance condition at room temperature, which we elucidated by the proposed nonradiative energy drain transfer mechanism. Our study thus demonstrates the experimental feasibility and great promises of the ultrathin VSH materials with chiral light emission, operable by physical fields for emerging opto-spintronic, valleytronic, and quantum information concepts.
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Affiliation(s)
- Vaibhav Varade
- Department
of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121
16Prague 2, Czech
Republic
| | - Golam Haider
- J.
Heyrovsky Institute of Physical Chemistry, Dolejskova 3, 182
23Prague 8, Czech
Republic
| | - Artur Slobodeniuk
- Department
of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121
16Prague 2, Czech
Republic
| | - Richard Korytar
- Department
of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121
16Prague 2, Czech
Republic
| | - Tomas Novotny
- Department
of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121
16Prague 2, Czech
Republic
| | - Vaclav Holy
- Department
of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121
16Prague 2, Czech
Republic
| | - Jiri Miksatko
- J.
Heyrovsky Institute of Physical Chemistry, Dolejskova 3, 182
23Prague 8, Czech
Republic
| | - Jan Plsek
- J.
Heyrovsky Institute of Physical Chemistry, Dolejskova 3, 182
23Prague 8, Czech
Republic
| | - Jan Sykora
- J.
Heyrovsky Institute of Physical Chemistry, Dolejskova 3, 182
23Prague 8, Czech
Republic
| | - Miriam Basova
- Department
of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121
16Prague 2, Czech
Republic
| | - Martin Zacek
- Department
of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121
16Prague 2, Czech
Republic
| | - Martin Hof
- J.
Heyrovsky Institute of Physical Chemistry, Dolejskova 3, 182
23Prague 8, Czech
Republic
| | - Martin Kalbac
- J.
Heyrovsky Institute of Physical Chemistry, Dolejskova 3, 182
23Prague 8, Czech
Republic
| | - Jana Vejpravova
- Department
of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121
16Prague 2, Czech
Republic
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Kumari A, Shanbogh SM, Udachyan I, Kandaiah S, Roy A, Varade V, Ponnam A. Interface-Driven Multifunctionality in Two-Dimensional TiO 2 Nanosheet/Poly(Dimercaptothiadiazole-Triazine) Hybrid Resistive Random Access Memory Device. ACS Appl Mater Interfaces 2020; 12:56568-56578. [PMID: 33283514 DOI: 10.1021/acsami.0c16451] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Interface-driven multifunctional facets are gearing up in the field of science and technology. Here, we present the interface-activated resistive switching (RS), negative differential resistance, diode behavior, and ultraviolet (UV) light sensing in nanosheet-based hybrid devices. A hybrid device i.e., titanium dioxide nanosheet (TiO2-NS)/poly(dimercaptothiadiazole-triazine)[Poly(DMcT-CC)] is fabricated by spin coating Poly(DMcT-CC) polymer on hydrothermally as-grown TiO2-NS. The pristine devices of both materials show either small or no magnitude of RS, but the hybrid device shows highly enhanced RS of nearly four orders due to the formation of a p-n junction at the NS/polymer interface. The resistive random access memory feature appears to be more prominent in the hybrid device i.e., high and low current states are found to be stable in repetitive cycles since the interface acts as a trapping center for the carriers. The UV sensing ability of the hybrid device has been demonstrated by a threefold increment in a current at 60 mV. The impedance spectroscopy has been employed to show that the multifunctional features are directly associated to the NS/polymer interface, which deduce that the manipulation of such interfaces can pave the way for developing the hybrid structures.
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Affiliation(s)
- Anju Kumari
- Department of Physics, School of Applied Sciences, REVA University, Bengaluru 560064, India
| | - Shobith M Shanbogh
- Department of Physics, School of Applied Sciences, REVA University, Bengaluru 560064, India
| | - Iranna Udachyan
- Department of Chemical Science, The Radical Research Center and the Schlesinger Family Center for Compact Accelerators, Radiation Sources and Application, Ariel University, Ariel 40700, Israel
| | - Sakthivel Kandaiah
- Department of Chemistry, School of Applied Sciences, REVA University, Bengaluru 560064, India
| | - Amit Roy
- Department of Physics, Indian Institute of Science, Bengaluru 560012, India
| | - Vaibhav Varade
- Department of Condensed Matter Physics, Charles University, Prague 116 36, Czech Republic
| | - Anjaneyulu Ponnam
- Department of Physics, School of Applied Sciences, REVA University, Bengaluru 560064, India
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Tassinari F, Jayarathna DR, Kantor-Uriel N, Davis KL, Varade V, Achim C, Naaman R. Chirality Dependent Charge Transfer Rate in Oligopeptides. Adv Mater 2018; 30:e1706423. [PMID: 29611223 DOI: 10.1002/adma.201706423] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Revised: 02/19/2018] [Indexed: 05/21/2023]
Abstract
It is shown that "spontaneous magnetization" occurs when chiral oligopeptides are attached to ferrocene and are self-assembled on a gold substrate. As a result, the electron transfer, measured by electrochemistry, shows asymmetry in the reduction and oxidation rate constants; this asymmetry is reversed between the two enantiomers. The results can be explained by the chiral induced spin selectivity of the electron transfer. The measured magnetization shows high anisotropy and the "easy axis" of magnetization is along the molecular axis.
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Affiliation(s)
- Francesco Tassinari
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | | | - Nirit Kantor-Uriel
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Kathryn L Davis
- Department of Chemistry, Manchester University, North Manchester, IN, 46962, USA
| | - Vaibhav Varade
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Catalina Achim
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Ron Naaman
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
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Varade V, Markus T, Vankayala K, Friedman N, Sheves M, Waldeck DH, Naaman R. Bacteriorhodopsin based non-magnetic spin filters for biomolecular spintronics. Phys Chem Chem Phys 2018; 20:1091-1097. [DOI: 10.1039/c7cp06771b] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [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
We discuss spin injection and spin valves, which are based on organic and biomolecules, that offer the possibility to overcome some of the limitations of solid-state devices, which are based on ferromagnetic metal electrodes.
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Affiliation(s)
- Vaibhav Varade
- Department of Chemical and Biological Physics
- Weizmann Institute of Science
- Rehovot
- Israel
| | - Tal Markus
- Department of Chemical and Biological Physics
- Weizmann Institute of Science
- Rehovot
- Israel
| | - Kiran Vankayala
- Department of Chemical and Biological Physics
- Weizmann Institute of Science
- Rehovot
- Israel
| | - Noga Friedman
- Department of Organic Chemistry
- Weizmann Institute of Science
- Rehovot
- Israel
| | - Mordechai Sheves
- Department of Organic Chemistry
- Weizmann Institute of Science
- Rehovot
- Israel
| | | | - Ron Naaman
- Department of Chemical and Biological Physics
- Weizmann Institute of Science
- Rehovot
- Israel
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Abstract
We review a recently discovered phenomenon, the chiral induced spin selectivity (CISS) effect, that can enable a new technology for the injection of spin polarized current without the need for a permanent magnetic layer. The effect occurs in chiral molecules and systems without parity symmetry, i.e. systems that do not have inversion symmetry. The theoretical foundations for the effect are presented first and then followed by several examples of spin-valves that are based on chiral systems. The CISS-based spin valves introduce the possibility to inject spin current without the use of a permanent magnet and to achieve relatively large magnetoresistance at room temperature.
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Affiliation(s)
- Karen Michaeli
- Department of Condensed Matter, Weizmann Institute of Science, Rehovot 76100, Israel
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Abstract
This work demonstrates that chiral imprinted CdSe quantum dots (QDs) can act as spin selective filters for charge transport. The spin filtering properties of chiral nanoparticles were investigated by magnetic conductive-probe atomic force microscopy (mCP-AFM) measurements and magnetoresistance measurements. The mCP-AFM measurements show that the chirality of the quantum dots and the magnetic orientation of the tip affect the current-voltage curves. Similarly, magnetoresistance measurements demonstrate that the electrical transport through films of chiral quantum dots correlates with the chiroptical properties of the QD. The spin filtering properties of chiral quantum dots may prove useful in future applications, for example, photovoltaics, spintronics, and other spin-driven devices.
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Affiliation(s)
- Brian P Bloom
- Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
| | - Vankayala Kiran
- Department of Chemical Physics, Weizmann Institute , Rehovot 76100, Israel
| | - Vaibhav Varade
- Department of Chemical Physics, Weizmann Institute , Rehovot 76100, Israel
| | - Ron Naaman
- Department of Chemical Physics, Weizmann Institute , Rehovot 76100, Israel
| | - David H Waldeck
- Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
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