Spin Relaxation in Single-Layer and Bilayer Graphene

被引：310

作者：

Han, Wei ^{[1
]}

Kawakami, R. K. ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 04期

基金：

美国国家科学基金会;

关键词：

ELECTRICAL DETECTION; PRECESSION; TRANSPORT;

D O I：

10.1103/PhysRevLett.107.047207

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate spin relaxation in graphene spin valves and observe strongly contrasting behavior for single-layer graphene (SLG) and bilayer graphene (BLG). In SLG, the spin lifetime (tau(s)) varies linearly with the momentum scattering time (tau(p)) as carrier concentration is varied, indicating the dominance of Elliot-Yafet (EY) spin relaxation at low temperatures. In BLG, tau(s) and tau(p) exhibit an inverse dependence, which indicates the dominance of Dyakonov-Perel spin relaxation at low temperatures. The different behavior is due to enhanced screening and/or reduced surface sensitivity of BLG, which greatly reduces the impurity-induced EY spin relaxation.

引用

页数：4

共 34 条

[1] Impurity-Induced Spin-Orbit Coupling in Graphene
Castro Neto, A. H.
Guinea, F.
[J]. PHYSICAL REVIEW LETTERS, 2009, 103 (02)
[2] Gate-tunable graphene spin valve
Cho, Sungjae
Chen, Yung-Fu
Fuhrer, Michael S.
[J]. APPLIED PHYSICS LETTERS, 2007, 91 (12)
[3] Spin dephasing and pumping in graphene due to random spin-orbit interaction
Dugaev, V. K.
Ya Sherman, E.
Barnas, J.
[J]. PHYSICAL REVIEW B, 2011, 83 (08)
[4] Spin relaxation and combined resonance in two-dimensional electron systems with spin-orbit disorder
Dugaev, V. K.
Sherman, E. Ya.
Ivanov, V. I.
Barnas, J.
[J]. PHYSICAL REVIEW B, 2009, 80 (08)
[5] THEORY OF THE EFFECT OF SPIN-ORBIT COUPLING ON MAGNETIC RESONANCE IN SOME SEMICONDUCTORS
ELLIOTT, RJ
[J]. PHYSICAL REVIEW, 1954, 96 (02): : 266 - 279
[6] Electron spin relaxation in graphene: The role of the substrate
Ertler, Christian
Konschuh, Sergej
Gmitra, Martin
Fabian, Jaroslav
[J]. PHYSICAL REVIEW B, 2009, 80 (04):
[7] Fabian J, 2007, ACTA PHYS SLOVACA, V57, P565, DOI 10.2478/v10155-010-0086-8
[8] Raman spectrum of graphene and graphene layers
Ferrari, A. C.
Meyer, J. C.
Scardaci, V.
Casiraghi, C.
Lazzeri, M.
Mauri, F.
Piscanec, S.
Jiang, D.
Novoselov, K. S.
Roth, S.
Geim, A. K.
[J]. PHYSICAL REVIEW LETTERS, 2006, 97 (18)
[9] The rise of graphene
Geim, A. K.
Novoselov, K. S.
[J]. NATURE MATERIALS, 2007, 6 (03) : 183 - 191
[10] Gate control of spin transport in multilayer graphene
Goto, H.
Kanda, A.
Sato, T.
Tanaka, S.
Ootuka, Y.
Odaka, S.
Miyazaki, H.
Tsukagoshi, K.
Aoyagi, Y.
[J]. APPLIED PHYSICS LETTERS, 2008, 92 (21)

← 1 2 3 4 →