Weak localization in bilayer graphene

被引：195
|
作者：
Gorbachev, R. V. [1 ]
Tikhonenko, F. V. [1 ]
Mayorov, A. S. [1 ]
Horsell, D. W. [1 ]
Savchenko, A. K. [1 ]
机构：
[1] Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 17期
关键词：
D O I：
10.1103/PhysRevLett.98.176805
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have performed the first experimental investigation of quantum interference corrections to the conductivity of a bilayer graphene structure. A negative magnetoresistance - a signature of weak localization-is observed at different carrier densities, including the electroneutrality region. It is very different, however, from the weak localization in conventional two-dimensional systems. We show that it is controlled not only by the dephasing time, but also by different elastic processes that break the effective time-reversal symmetry and provide intervalley scattering.
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页数：4
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