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.
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页数：4
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共 34 条
  • [21] Electrical detection of spin transport in lateral ferromagnet-semiconductor devices
    Lou, Xiaohua
    Adelmann, Christoph
    Crooker, Scott A.
    Garlid, Eric S.
    Zhang, Jianjie
    Reddy, K. S. Madhukar
    Flexner, Soren D.
    Palmstrom, Chris J.
    Crowell, Paul A.
    [J]. NATURE PHYSICS, 2007, 3 (03) : 197 - 202
  • [22] Comparison between charge and spin transport in few-layer graphene
    Maassen, T.
    Dejene, F. K.
    Guimaraes, M. H. D.
    Jozsa, C.
    van Wees, B. J.
    [J]. PHYSICAL REVIEW B, 2011, 83 (11):
  • [23] Meier F., 1984, OPTICAL ORIENTATION, V8
  • [24] Intrinsic and Rashba spin-orbit interactions in graphene sheets
    Min, Hongki
    Hill, J. E.
    Sinitsyn, N. A.
    Sahu, B. R.
    Kleinman, Leonard
    MacDonald, A. H.
    [J]. PHYSICAL REVIEW B, 2006, 74 (16):
  • [25] Electric field effect in atomically thin carbon films
    Novoselov, KS
    Geim, AK
    Morozov, SV
    Jiang, D
    Zhang, Y
    Dubonos, SV
    Grigorieva, IV
    Firsov, AA
    [J]. SCIENCE, 2004, 306 (5696) : 666 - 669
  • [26] Perel V, 1972, SOV PHYS-SOLID STATE, V13, P3023
  • [27] Manipulation of Spin Transport in Graphene by Surface Chemical Doping
    Pi, K.
    Han, Wei
    McCreary, K. M.
    Swartz, A. G.
    Li, Yan
    Kawakami, R. K.
    [J]. PHYSICAL REVIEW LETTERS, 2010, 104 (18)
  • [28] Electronic spin transport in graphene field-effect transistors
    Popinciuc, M.
    Jozsa, C.
    Zomer, P. J.
    Tombros, N.
    Veligura, A.
    Jonkman, H. T.
    van Wees, B. J.
    [J]. PHYSICAL REVIEW B, 2009, 80 (21)
  • [29] Robustness of Spin Polarization in Graphene-Based Spin Valves
    Shiraishi, Masashi
    Ohishi, Megumi
    Nouchi, Ryo
    Mitoma, Nobuhiko
    Nozaki, Takayuki
    Shinjo, Teruya
    Suzuki, Yoshishige
    [J]. ADVANCED FUNCTIONAL MATERIALS, 2009, 19 (23) : 3711 - 3716
  • [30] Tombros N, 2007, NATURE, V448, P571, DOI 10.1038/nature06037
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