Electron-phonon coupling origin of the graphene π*-band kink via isotope effect

被引：4

作者：

Bisti, F. ^{[1
,2
]}

Priante, F. ^{[1
]}

Fedorov, A., V ^{[3
,4
]}

Donarelli, M. ^{[1
]}

Fantasia, M. ^{[1
]}

Petaccia, L. ^{[5
]}

Frank, O. ^{[6
]}

Kalbac, M. ^{[6
]}

Profeta, G. ^{[1
,7
]}

Gruneis, A. ^{[8
]}

Ottaviano, L. ^{[1
,7
]}

机构：

[1] Univ Aquila, Dipartimento Sci Fis & Chim, Via Vetoio 10, I-67100 Laquila, Italy

[2] ALBA Synchrotron Light Source, Cerdanyola Del Valles 08290, Spain

[3] IFW Dresden, Leibniz Inst Solid State & Mat Res, D-01171 Dresden, Germany

[4] Helmholtz Zentrum Berlin Mat & Energie, D-14109 Berlin, Germany

[5] Elettra Sincrotrone Trieste, Str Statale 14 Km 163-5, I-34149 Trieste, Italy

[6] Czech Acad Sci, J Heyrovsky Inst Phys Chem, Dolejskova 3, CZ-18223 Prague 8, Czech Republic

[7] CNR Spin Aquila, Via Vetoio 10, I-67100 Laquila, Italy

[8] Univ Cologne, Inst Phys 2, Zulpicher Str 77, D-50937 Cologne, Germany

来源：

PHYSICAL REVIEW B | 2021年 / 103卷 / 03期

关键词：

BILAYER GRAPHENE; SUPERCONDUCTIVITY;

D O I：

10.1103/PhysRevB.103.035119

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The pi*-band renormalization of Li-doped quasifreestanding graphene has been investigated by means of isotope (C-13) substitution and angle-resolved photoemission spectroscopy. The well documented sudden slope change (known as "kink") located at 169 meV from the Fermi level in the graphene made of C-12 atoms shifts to 162 meV once the carbon monolayer is composed by C-13 isotope. Such an energy shift is in excellent agreement with the expected softening of the phonon energy distribution due to the isotope substitution and provides, therefore, an indisputable experimental proof of the electron-phonon coupling origin of this well known many-body feature in the electronic structure of graphene.

引用

页数：5

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