Výsledky vyhledávání - "Oleg O. Brovko"

Akademický článek

Mechanical dissipation from charge and spin transitions in oxygen-deficient SrTiO3 surfaces

Autor: Marcin Kisiel, Oleg O. Brovko, Dilek Yildiz, Rémy Pawlak, Urs Gysin, Erio Tosatti, Ernst Meyer

Publikováno v: Nature Communications, Vol 9, Iss 1, Pp 1-7 (2018)

Non-contact atomic force microscope (AFM) dissipation contains rich information on the electron, phonon and spin states, but has been poorly understood. Here the authors demonstrated that tip-induced charge and spin state transitions in oxygen vacanc

Externí odkaz: https://doaj.org/article/b2556b096cde4534bbbb1cc4d49eb689

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Correlation-Driven Dimerization and Topological Gap Opening in Isotropically Strained Graphene

Autor: Kazuhiro Seki, Seiji Yunoki, Shohei Miyakoshi, Oleg O. Brovko, Sandro Sorella, Erio Tosatti, Tomonori Shirakawa

Publikováno v: Physical review letters 121 (2018). doi:10.1103/PhysRevLett.121.066402
info:cnr-pdr/source/autori:Sorella S.; Seki K.; Brovko O.O.; Shirakawa T.; Miyakoshi S.; Yunoki S.; Tosatti E./titolo:Correlation-Driven Dimerization and Topological Gap Opening in Isotropically Strained Graphene/doi:10.1103%2FPhysRevLett.121.066402/rivista:Physical review letters/anno:2018/pagina_da:/pagina_a:/intervallo_pagine:/volume:121

The phase diagram of isotropically expanded graphene cannot be correctly predicted by ignoring either electron correlations, or mobile carbons, or the effect of applied stress, as was done so far. We calculate the ground state enthalpy (not just ener

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bca5fbd958bd440ab34c2f9c8f26b2f5

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Controlling the magnetism of oxygen surface vacancies in SrTiO3 through charging

Autor: Erio Tosatti, Oleg O. Brovko

Publikováno v: Physical Review Materials. 1

We discuss, based on first-principles calculations, the possibility of tuning the magnetism of oxygen vacancies at the (001) surface of strontium titanate $({\mathrm{SrTiO}}_{3})$. The magnetic moment of single and clustered vacancies stemming from $

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0c06a4d193ef982d63dc5697903d92fb
https://doi.org/10.1103/physrevmaterials.1.044405

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Gate control of spin-polarized conductance in alloyed transitional metal nanocontacts

Autor: Valeri S. Stepanyuk, Ilia N. Sivkov, Ivan Rungger, Oleg O. Brovko

Publikováno v: Physical Review B. 95

To date, endeavors in nanoscale spintronics are dominated by the use of single-electron or single-spin transistors having at their heart a semiconductor, metallic or molecular quantum dot who's localized states are non-spin-degenerate and can be cont

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ddcd0bcdb31aac1947614addbcf9b277
https://doi.org/10.1103/physrevb.95.104405

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Effect of mesoscopic misfit on growth, morphology, electronic properties and magnetism of nanostructures at metallic surfaces

Autor: Valeri S. Stepanyuk, Dirk Sander, Oleg O. Brovko, Dmitry I. Bazhanov, Jürgen Kirschner, Holger L. Meyerheim

Publikováno v: Surface Science Reports. 69:159-195

Stress and strain originating from mesoscopic misfit at interfaces can have diverse effects on the properties of surfaces and nanostructures thereon. We review the sources and consequences of mesoscopic misfit at metallic surfaces and elucidate vario

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::16ed0680e20591b19d114c98fe027977
https://doi.org/10.1016/j.surfrep.2014.08.001

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Probing the magnetism of nanostructures buried in metallic surfaces and their possible utilization

Autor: Valeri S. Stepanyuk, Oleg O. Brovko

Publikováno v: physica status solidi (b). 247:1161-1169

We discuss the possibility to probe magnetic properties of nanostructures buried beneath a metallic surface by means of local probe techniques. We prove, that those properties can be deduced from the spin-resolved local density of states (LDOS) above

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7608b2ba6c7f3b8415152f829e770798
https://doi.org/10.1002/pssb.200945477

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Laser control of the structure of a photosensitive substrate for enzymatic reaction

Autor: I.K. Sakodynskaya, S. I. Lebedenko, K. Itoh, Vladimir I. Polshakov, Nikolai N. Brandt, Oleg O. Brovko, A. Yu. Chikishev

Publikováno v: Laser Physics. 17:1262-1265

Enzymatic reaction can be controlled with a photosensitive substrate. The activation of such a substrate with laser radiation at various wavelengths is studied. The optimal wavelength and irradiation doze are determined.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::288eafe1b18e12126656873644aa27c6
https://doi.org/10.1134/s1054660x07100131

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Quantum engineering of spin and anisotropy in magnetic molecular junctions

Autor: Klaus Kern, Markus Ternes, Tobias Herden, Valeri S. Stepanyuk, Peter Jacobson, Gennadii Laskin, Matthias Muenks, Oleg O. Brovko

Publikováno v: Nature Communications

Single molecule magnets and single spin centres can be individually addressed when coupled to contacts forming an electrical junction. To control and engineer the magnetism of quantum devices, it is necessary to quantify how the structural and chemic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc1df6d7ff86bf35584dd4f4b6ec56e6
https://doi.org/10.1038/ncomms9536

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Resolution of the time-resolved absorption spectra of three-component systems into spectral components and determination of transition constants

Autor: A. Yu. Chikishev, Nikolai N. Brandt, Oleg O. Brovko

Publikováno v: Laser Physics. 16:1658-1663

A mathematical model and method are proposed for the processing of the experimental results on the photoinduced absorption at optical densities of the substances under study of about unity. In such experiments, the pump intensity and the concentratio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c85819f690edace6e08205b267eb93fa
https://doi.org/10.1134/s1054660x06120103

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Spin-polarized transport properties of GdN nanocontacts

Autor: Ilia N. Sivkov, Valeri S. Stepanyuk, Oleg O. Brovko

Publikováno v: Physical Review B. 89

Gadolinium nitride (GdN) nanocontacts were recently experimentally shown to be efficient spin filters. Our study is aimed at identifying and analyzing the physical processes responsible for the high spin polarization of the tunneling current in GdN n

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::17aba7f48647cdd295f19ccb5ad5948c
https://doi.org/10.1103/physrevb.89.195419

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