Electron-phonon coupling in graphene placed between magnetic Li and Si layers on cobalt

Dmitry Yu. Usachov, Alexander V. Fedorov, Oleg Yu. Vilkov, Ilya I. Ogorodnikov, Mikhail V. Kuznetsov, Alexander Grueneis, Clemens Laubschat, Denis V. Vyalikh

Результат исследований: Научные публикации в периодических изданияхстатья

6 Цитирования (Scopus)

Выдержка

Using angle-resolved photoemission spectroscopy (ARPES), we study the electronic structure and electron-phonon coupling in a Li-doped graphene monolayer decoupled from the Co(0001) substrate by intercalation of silicon. Based on the photoelectron diffraction measurements, we disclose the structural properties of the Si/Co interface. Our density functional theory calculations demonstrate that in the studied Li/graphene/Si/Co system the magnetism of Co substrate induces notable magnetic moments on Li and Si atoms. At the same time graphene remains almost nonmagnetic and clamped between two magnetically active atomic layers with antiparallel magnetizations. ARPES maps of the graphene Fermi surface reveal strong electron doping, which may lead to superconductivity mediated by electron-phonon coupling (EPC). Analysis of the spectral function of photoelectrons reveals apparent anisotropy of EPC in the k space. These properties make the studied system tempting for studying the relation between superconductivity and magnetism in two-dimensional materials.

Язык оригиналаАнглийский
Номер статьи085132
Число страниц8
ЖурналPhysical Review B
Том97
Номер выпуска8
DOI
СостояниеОпубликовано - 21 фев 2018

Цитировать

Usachov, D. Y., Fedorov, A. V., Vilkov, O. Y., Ogorodnikov, I. I., Kuznetsov, M. V., Grueneis, A., ... Vyalikh, D. V. (2018). Electron-phonon coupling in graphene placed between magnetic Li and Si layers on cobalt. Physical Review B, 97(8), [085132]. https://doi.org/10.1103/PhysRevB.97.085132
Usachov, Dmitry Yu. ; Fedorov, Alexander V. ; Vilkov, Oleg Yu. ; Ogorodnikov, Ilya I. ; Kuznetsov, Mikhail V. ; Grueneis, Alexander ; Laubschat, Clemens ; Vyalikh, Denis V. / Electron-phonon coupling in graphene placed between magnetic Li and Si layers on cobalt. В: Physical Review B. 2018 ; Том 97, № 8.
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title = "Electron-phonon coupling in graphene placed between magnetic Li and Si layers on cobalt",
abstract = "Using angle-resolved photoemission spectroscopy (ARPES), we study the electronic structure and electron-phonon coupling in a Li-doped graphene monolayer decoupled from the Co(0001) substrate by intercalation of silicon. Based on the photoelectron diffraction measurements, we disclose the structural properties of the Si/Co interface. Our density functional theory calculations demonstrate that in the studied Li/graphene/Si/Co system the magnetism of Co substrate induces notable magnetic moments on Li and Si atoms. At the same time graphene remains almost nonmagnetic and clamped between two magnetically active atomic layers with antiparallel magnetizations. ARPES maps of the graphene Fermi surface reveal strong electron doping, which may lead to superconductivity mediated by electron-phonon coupling (EPC). Analysis of the spectral function of photoelectrons reveals apparent anisotropy of EPC in the k space. These properties make the studied system tempting for studying the relation between superconductivity and magnetism in two-dimensional materials.",
keywords = "INTERCALATED BILAYER GRAPHENE, ANGLE-RESOLVED PHOTOEMISSION, METAL-SURFACES, SUPERCONDUCTIVITY, APPROXIMATION",
author = "Usachov, {Dmitry Yu.} and Fedorov, {Alexander V.} and Vilkov, {Oleg Yu.} and Ogorodnikov, {Ilya I.} and Kuznetsov, {Mikhail V.} and Alexander Grueneis and Clemens Laubschat and Vyalikh, {Denis V.}",
year = "2018",
month = "2",
day = "21",
doi = "10.1103/PhysRevB.97.085132",
language = "Английский",
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journal = "Physical Review B-Condensed Matter",
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Usachov, DY, Fedorov, AV, Vilkov, OY, Ogorodnikov, II, Kuznetsov, MV, Grueneis, A, Laubschat, C & Vyalikh, DV 2018, 'Electron-phonon coupling in graphene placed between magnetic Li and Si layers on cobalt', Physical Review B, том. 97, № 8, 085132. https://doi.org/10.1103/PhysRevB.97.085132

Electron-phonon coupling in graphene placed between magnetic Li and Si layers on cobalt. / Usachov, Dmitry Yu.; Fedorov, Alexander V.; Vilkov, Oleg Yu.; Ogorodnikov, Ilya I.; Kuznetsov, Mikhail V.; Grueneis, Alexander; Laubschat, Clemens; Vyalikh, Denis V.

В: Physical Review B, Том 97, № 8, 085132, 21.02.2018.

Результат исследований: Научные публикации в периодических изданияхстатья

TY - JOUR

T1 - Electron-phonon coupling in graphene placed between magnetic Li and Si layers on cobalt

AU - Usachov, Dmitry Yu.

AU - Fedorov, Alexander V.

AU - Vilkov, Oleg Yu.

AU - Ogorodnikov, Ilya I.

AU - Kuznetsov, Mikhail V.

AU - Grueneis, Alexander

AU - Laubschat, Clemens

AU - Vyalikh, Denis V.

PY - 2018/2/21

Y1 - 2018/2/21

N2 - Using angle-resolved photoemission spectroscopy (ARPES), we study the electronic structure and electron-phonon coupling in a Li-doped graphene monolayer decoupled from the Co(0001) substrate by intercalation of silicon. Based on the photoelectron diffraction measurements, we disclose the structural properties of the Si/Co interface. Our density functional theory calculations demonstrate that in the studied Li/graphene/Si/Co system the magnetism of Co substrate induces notable magnetic moments on Li and Si atoms. At the same time graphene remains almost nonmagnetic and clamped between two magnetically active atomic layers with antiparallel magnetizations. ARPES maps of the graphene Fermi surface reveal strong electron doping, which may lead to superconductivity mediated by electron-phonon coupling (EPC). Analysis of the spectral function of photoelectrons reveals apparent anisotropy of EPC in the k space. These properties make the studied system tempting for studying the relation between superconductivity and magnetism in two-dimensional materials.

AB - Using angle-resolved photoemission spectroscopy (ARPES), we study the electronic structure and electron-phonon coupling in a Li-doped graphene monolayer decoupled from the Co(0001) substrate by intercalation of silicon. Based on the photoelectron diffraction measurements, we disclose the structural properties of the Si/Co interface. Our density functional theory calculations demonstrate that in the studied Li/graphene/Si/Co system the magnetism of Co substrate induces notable magnetic moments on Li and Si atoms. At the same time graphene remains almost nonmagnetic and clamped between two magnetically active atomic layers with antiparallel magnetizations. ARPES maps of the graphene Fermi surface reveal strong electron doping, which may lead to superconductivity mediated by electron-phonon coupling (EPC). Analysis of the spectral function of photoelectrons reveals apparent anisotropy of EPC in the k space. These properties make the studied system tempting for studying the relation between superconductivity and magnetism in two-dimensional materials.

KW - INTERCALATED BILAYER GRAPHENE

KW - ANGLE-RESOLVED PHOTOEMISSION

KW - METAL-SURFACES

KW - SUPERCONDUCTIVITY

KW - APPROXIMATION

U2 - 10.1103/PhysRevB.97.085132

DO - 10.1103/PhysRevB.97.085132

M3 - статья

VL - 97

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 8

M1 - 085132

ER -

Usachov DY, Fedorov AV, Vilkov OY, Ogorodnikov II, Kuznetsov MV, Grueneis A и соавт. Electron-phonon coupling in graphene placed between magnetic Li and Si layers on cobalt. Physical Review B. 2018 Февр. 21;97(8). 085132. https://doi.org/10.1103/PhysRevB.97.085132