Mesoscopic conductance fluctuations in graphene
Mesoscopic conductance fluctuations in graphene
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DOI：
10.1016/j.ssc.2009.02.058
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发表时间：
2009-07-01
影响因子：
2.1
通讯作者：
Fal'ko, V. I.
中科院分区：
文献类型：
--
作者：
Horsell, D. W.;Savchenko, A. K.;Fal'ko, V. I.
我们研究了微米级石墨烯器件的电导随费米能和磁场的变化规律。结合弱局域化的分析，这是由相同的散射机制的波动进行了研究。结果表明，电导波动的方差不仅取决于非弹性散射，控制退相，但也对弹性散射。特别是，相反，其效果弱本地化，强烈的谷间散射抑制石墨烯电导波动。然而，相关能与弹性散射的细节无关，并且可以用于确定石墨烯结构的电子温度。(C)2009爱思唯尔有限公司保留所有权利。
We study fluctuations of the conductance of micron-sized graphene devices as a function of the Fermi energy and magnetic field. The fluctuations are studied in combination with analysis of weak localization which is determined by the same scattering mechanisms. It is shown that the variance of conductance fluctuations depends not only on inelastic scattering that controls dephasing but also on elastic scattering. In particular, contrary to its effect on weak localization, strong intervalley scattering suppresses conductance fluctuations in graphene. The correlation energy, however, is independent of the details of elastic scattering and can be used to determine the electron temperature of graphene structures. (C) 2009 Elsevier Ltd. All rights reserved.