Spin-Orbit-Mediated Spin Relaxation in Graphene

被引：186

作者：

Huertas-Hernando, D. ^{[1
]}

Guinea, F. ^{[2
]}

Brataas, Arne ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Phys, NO-7491 Trondheim, Norway

[2] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 14期

关键词：

CARBON NANOTUBES; ELECTRONS; SEMICONDUCTORS; TRANSPORT;

D O I：

10.1103/PhysRevLett.103.146801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate how spins relax in intrinsic graphene. The spin-orbit coupling arises from the band structure and is enhanced by ripples. The orbital motion is influenced by scattering centers and ripple-induced gauge fields. Spin relaxation due to Elliot-Yafet and Dyakonov-Perel mechanisms and gauge fields in combination with spin-orbit coupling are discussed. In intrinsic graphene, the Dyakonov-Perel mechanism and spin flip due to gauge fields dominate and the spin-flip relaxation time is inversely proportional to the elastic scattering time. The spin-relaxation anisotropy depends on an intricate competition between these mechanisms. Experimental consequences are discussed.

引用

页数：4

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