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Turishchev SY, Parinova EV, Pisliaruk AK, Koyuda DA, Yermukhamed D, Ming T, Ovsyannikov R, Smirnov D, Makarova A, Sivakov V. Surface deep profile synchrotron studies of mechanically modified top-down silicon nanowires array using ultrasoft X-ray absorption near edge structure spectroscopy. Sci Rep 2019; 9:8066. [PMID: 31147575 PMCID: PMC6542791 DOI: 10.1038/s41598-019-44555-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 05/17/2019] [Indexed: 11/09/2022] Open
Abstract
Atomic, electronic structure and composition of top-down metal-assisted wet-chemically etched silicon nanowires were studied by synchrotron radiation based X-ray absorption near edge structure technique. Local surrounding of the silicon and oxygen atoms in silicon nanowires array was studied on as-prepared nanostructured surfaces (atop part of nanowires) and their bulk part after, first time applied, in-situ mechanical removal atop part of the formed silicon nanowires. Silicon suboxides together with disturbed silicon dioxide were found in the composition of the formed arrays that affects the electronic structure of silicon nanowires. The results obtained by us convincingly testify to the homogeneity of the phase composition of the side walls of silicon nanowires and the electronic structure in the entire length of the nanowire. The controlled formation of the silicon nanowires array may lead to smart engineering of its atomic and electronic structure that influences the exploiting strategy of metal-assisted wet-chemically etched silicon nanowires as universal matrices for different applications.
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Affiliation(s)
| | - E V Parinova
- Voronezh State University, Voronezh, 394018, Russia
| | | | - D A Koyuda
- Voronezh State University, Voronezh, 394018, Russia
| | - D Yermukhamed
- al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
| | - T Ming
- Leibniz Institute of Photonic Technology, Jena, 07745, Germany
| | | | - D Smirnov
- Dresden University of Technology, Dresden, 01062, Germany
| | - A Makarova
- Dresden University of Technology, Dresden, 01062, Germany
| | - V Sivakov
- Leibniz Institute of Photonic Technology, Jena, 07745, Germany.
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Sánchez-Barriga J, Ovsyannikov R, Fink J. Strong Spin Dependence of Correlation Effects in Ni Due to Stoner Excitations. Phys Rev Lett 2018; 121:267201. [PMID: 30636126 DOI: 10.1103/physrevlett.121.267201] [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] [Received: 05/24/2018] [Indexed: 06/09/2023]
Abstract
Using high-resolution angle-resolved photoemission, we observe a strong spin-dependent renormalization and lifetime broadening of the quasiparticle excitations in the electronic band structure of Ni(111) in an energy window of ∼0.3 eV below the Fermi level. We derive a quantitative result for the spin-dependent lifetime broadening by comparing the scattering rates of majority and minority d states, and further show that spin-dependent electron correlations are instead negligible for sp states. From our analysis we experimentally determine the effective on-site Coulomb interaction U caused by Stoner-like interband transitions between majority and minority d states. The present results demonstrate the remarkable impact of spin-dependent electron correlation effects originating from single-particle excitations in a prototypical 3d transition metal, paving the way for further refinement of current many-body theoretical approaches.
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Affiliation(s)
- J Sánchez-Barriga
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - R Ovsyannikov
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - J Fink
- Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzerstrasse 40, D-01187 Dresden, Germany
- Institut für Festkörperphysik, Technische Universität Dresden, D-01062 Dresden, Germany
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Pookpanratana S, Goetz K, Bittle E, Haneef H, You L, Hacker C, Robey S, Jurchescu O, Ovsyannikov R, Giangrisostomi E. Electronic properties and structure of single crystal perylene. Org Electron 2018; 61:10.1016/j.orgel.2018.05.035. [PMID: 30983924 PMCID: PMC6459418 DOI: 10.1016/j.orgel.2018.05.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The transport properties of electronic devices made from single crystalline molecular semiconductors typically outperform those composed of thin-films of the same material. To further understand the superiority of these extrinsic device properties, an understanding of the intrinsic electronic structure and properties of the organic semiconductor is necessary. An investigation of the electronic structure and properties of single crystal α-phase perylene (C20H12), a five-ringed aromatic molecule, is presented using angle-resolved ultraviolet photoemission, x-ray photoelectron spectroscopy (XPS), and field-effect transistor measurements. Key aspects of the electronic structure of single crystal α-perylene critical to charge transport are determined, including the energetic location of the highest occupied molecular orbital (HOMO), the HOMO bandwidth, and surface work function. In addition, using high resolution XPS, we can distinguish between inequivalent carbon atoms within the perylene crystal and, from the shake-up satellite structure in XPS, gain insight into the intramolecular properties in α-perylene. From the device measurements, the charge carrier mobility of α-perylene is found to depend on the device structure and the choice of dielectric, with values in the range of 10-3 cm2 V-1 s-1.
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Affiliation(s)
- S.J. Pookpanratana
- Engineering Physics Division, National Institute of Standards and Technology (NIST), USA
| | - K.P. Goetz
- Department of Physics, Wake Forest University, USA
- Physical Chemistry Institute, Universität Heidelberg, Germany
| | - E.G. Bittle
- Engineering Physics Division, National Institute of Standards and Technology (NIST), USA
| | - H. Haneef
- Department of Physics, Wake Forest University, USA
| | - L. You
- Engineering Physics Division, National Institute of Standards and Technology (NIST), USA
- Theiss Research, USA
| | - C.A. Hacker
- Engineering Physics Division, National Institute of Standards and Technology (NIST), USA
| | - S.W. Robey
- Materials Measurement Science Division, NIST, USA
| | | | - R. Ovsyannikov
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin (HZB) für Materialien und Energie, Germany
| | - E. Giangrisostomi
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin (HZB) für Materialien und Energie, Germany
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Turishchev SY, Antipov SS, Novolokina NV, Chuvenkova OA, Melekhov VV, Ovsyannikov R, Senkovskii BV, Timchenko AA, Ozoline ON, Domashevskaya EP. A soft X-ray synchrotron study of the charge state of iron ions in the ferrihydrite core of the ferritin Dps protein in Escherichia coli. Biophysics (Nagoya-shi) 2016. [DOI: 10.1134/s0006350916050286] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Schlesinger R, Bianchi F, Blumstengel S, Christodoulou C, Ovsyannikov R, Kobin B, Moudgil K, Barlow S, Hecht S, Marder SR, Henneberger F, Koch N. Efficient light emission from inorganic and organic semiconductor hybrid structures by energy-level tuning. Nat Commun 2015; 6:6754. [PMID: 25872919 PMCID: PMC4410639 DOI: 10.1038/ncomms7754] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Accepted: 02/24/2015] [Indexed: 12/18/2022] Open
Abstract
The fundamental limits of inorganic semiconductors for light emitting applications, such as holographic displays, biomedical imaging and ultrafast data processing and communication, might be overcome by hybridization with their organic counterparts, which feature enhanced frequency response and colour range. Innovative hybrid inorganic/organic structures exploit efficient electrical injection and high excitation density of inorganic semiconductors and subsequent energy transfer to the organic semiconductor, provided that the radiative emission yield is high. An inherent obstacle to that end is the unfavourable energy level offset at hybrid inorganic/organic structures, which rather facilitates charge transfer that quenches light emission. Here, we introduce a technologically relevant method to optimize the hybrid structure's energy levels, here comprising ZnO and a tailored ladder-type oligophenylene. The ZnO work function is substantially lowered with an organometallic donor monolayer, aligning the frontier levels of the inorganic and organic semiconductors. This increases the hybrid structure's radiative emission yield sevenfold, validating the relevance of our approach.
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Affiliation(s)
- R Schlesinger
- Institut für Physik &IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 6, 12489 Berlin, Germany
| | - F Bianchi
- Institut für Physik &IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 6, 12489 Berlin, Germany
| | - S Blumstengel
- Institut für Physik &IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 6, 12489 Berlin, Germany
| | - C Christodoulou
- Institut für Physik &IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 6, 12489 Berlin, Germany
| | - R Ovsyannikov
- Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, 12489 Berlin, Germany
| | - B Kobin
- Institut für Chemie &IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - K Moudgil
- School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, Georgia 30332-0400, USA
| | - S Barlow
- School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, Georgia 30332-0400, USA
| | - S Hecht
- Institut für Chemie &IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - S R Marder
- School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, Georgia 30332-0400, USA
| | - F Henneberger
- Institut für Physik &IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 6, 12489 Berlin, Germany
| | - N Koch
- 1] Institut für Physik &IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 6, 12489 Berlin, Germany [2] Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, 12489 Berlin, Germany
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Holldack K, Ovsyannikov R, Kuske P, Müller R, Schälicke A, Scheer M, Gorgoi M, Kühn D, Leitner T, Svensson S, Mårtensson N, Föhlisch A. Single bunch X-ray pulses on demand from a multi-bunch synchrotron radiation source. Nat Commun 2014; 5:4010. [DOI: 10.1038/ncomms5010] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Accepted: 04/29/2014] [Indexed: 11/09/2022] Open
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King PDC, Hatch RC, Bianchi M, Ovsyannikov R, Lupulescu C, Landolt G, Slomski B, Dil JH, Guan D, Mi JL, Rienks EDL, Fink J, Lindblad A, Svensson S, Bao S, Balakrishnan G, Iversen BB, Osterwalder J, Eberhardt W, Baumberger F, Hofmann P. Large tunable Rashba spin splitting of a two-dimensional electron gas in Bi2Se3. Phys Rev Lett 2011; 107:096802. [PMID: 21929260 DOI: 10.1103/physrevlett.107.096802] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Indexed: 05/13/2023]
Abstract
We report a Rashba spin splitting of a two-dimensional electron gas in the topological insulator Bi(2)Se(3) from angle-resolved photoemission spectroscopy. We further demonstrate its electrostatic control, and show that spin splittings can be achieved which are at least an order-of-magnitude larger than in other semiconductors. Together these results show promise for the miniaturization of spintronic devices to the nanoscale and their operation at room temperature.
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Affiliation(s)
- P D C King
- School of Physics and Astronomy, University of St. Andrews, St. Andrews, Fife KY16 9SS, United Kingdom
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Ovsyannikov R. Novel synthetic meso–macroporous silicates as carriers for enzyme immobilization. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.410] [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: 11/29/2022]
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Johansson E, Odelius M, Gorgoi M, Karis O, Ovsyannikov R, Schäfers F, Svensson S, Siegbahn H, Rensmo H. Valence electronic structure of ruthenium based complexes probed by photoelectron spectroscopy at high kinetic energy (HIKE) and modeled by DFT calculations. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.09.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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