Is There a Rashba Effect in Graphene on 3d Ferromagnets?

被引：134

作者：

Rader, O. ^{[1
]}

Varykhalov, A. ^{[1
]}

Sanchez-Barriga, J. ^{[1
]}

Marchenko, D. ^{[2
]}

Rybkin, A. ^{[2
]}

Shikin, A. M. ^{[2
]}

机构：

[1] Elektronenspeicherring BESSY II, Helmholtz Zentrum Berlin Mat & Energie, D-12489 Berlin, Germany

[2] St Petersburg State Univ, Inst Phys, St Petersburg 198504, Russia

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 05期

关键词：

PHOTOEMISSION; MONOLAYER; NI(111); CARBON;

D O I：

10.1103/PhysRevLett.102.057602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Graphene is considered a candidate material for spintronics. Recently, graphene grown on Ni(111) has been reported to show a Rashba effect which depends on the magnetization. By spin- and angle-resolved photoelectron spectroscopy, we investigate the preconditions for such an effect for graphene on Ni as well as on Co which has a similar to 3 X larger 3d magnetic moment: (i) spin polarization or (ii) exchange splitting of graphene pi states in normal emission geometry, and (iii) Rashba-type spin-orbit splitting off normal. As none of these are found to be of considerable size, the reported effect is neither Rashba-type, nor due to the spin-orbit coupling, nor involving the electron spin.

引用

页数：4

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