Spin-Dependent ππ* Gap in Graphene on a Magnetic Substrate

被引：1

作者：

Sheverdyaeva, P. M. ^{[1
]}

Bihlmayer, G. ^{[2
,3
,4
]}

Cappelluti, E. ^{[1
]}

Pacile, D. ^{[5
]}

Mazzola, F. ^{[6
,7
]}

Atodiresei, N. ^{[2
,3
,4
]}

Jugovac, M. ^{[8
]}

Grimaldi, I. ^{[5
]}

Contini, G. ^{[9
]}

Kundu, Asish K. ^{[1
,10
,11
]}

Vobornik, I. ^{[7
]}

Fujii, J. ^{[7
]}

Moras, P. ^{[1
]}

Carbone, C. ^{[1
]}

Ferrari, L. ^{[9
]}

机构：

[1] CNR, Ist Strut Mat, Str Statale 14,Km 163-5, I-34149 Trieste, Italy

[2] Peter Gronberg Inst, D-52425 Julich, Germany

[3] Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany

[4] JARA, D-52425 Julich, Germany

[5] Univ Calabria, Dipartimento Fis, I-87036 Arcavacata Di Rende, CS, Italy

[6] CaFoscari Univ Venice, Dept Mol Sci & Nanosyst, I-30172 Venice, Italy

[7] CNR, Ist Officina Mat, Str Statale 14,km 163-5, I-34149 Trieste, Italy

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

[9] CNR, Ist Strut Mat, Via Fosso Cavaliere 100, I-00133 Rome, Italy

[10] Abdus Salaam Int Ctr Theoret Phys, I-34151 Trieste, Italy

[11] Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 2024年 / 132卷 / 26期

关键词：

ELECTRON; POLARONS; DENSITY; LATTICE; BAND;

D O I：

10.1103/PhysRevLett.132.266401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a detailed analysis of the electronic properties of graphene/Eu/Ni(111). By using angle- and spin-resolved photoemission spectroscopy and ab initio calculations, we show that the intercalation of Eu in the graphene/Ni(111) interface gives rise to a gapped freestanding dispersion of the JvJv* Dirac cones at the K<overline> point with an additional lifting of the spin degeneracy due to the mixing of graphene and Eu states. The interaction with the magnetic substrate results in a large spin-dependent gap in the Dirac cones with a topological nature characterized by a large Berry curvature and a spin-polarized Van Hove singularity, whose closeness to the Fermi level gives rise to a polaronic band.

引用

页数：7

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