Levy flights in quantum transport in quasiballistic wires

被引:37
作者
Leadbeater, M
Falko, VI
Lambert, CJ
机构
[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[2] Univ Lancaster, Sch Phys & Chem, Lancaster LA1 4YB, England
[3] Univ Grenoble 1, Dept Phys, Grenoble 1, France
关键词
D O I
10.1103/PhysRevLett.81.1274
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Conductance fluctuations, localization, and statistics of Lyapunov exponents are studied numerically in pure metallic wires with rough boundaries (quasiballistic wires). We find that the correlation energy of conductance fluctuations scales anomalously with the sample dimensions, indicating the role of Levy flights. Application of a magnetic field deflects the Levy flights which reduces the localization length. This deflection also breaks geometrical flux cancellation and restores the usual Aharonov-Bohm type magnetoconductance fluctuations.
引用
收藏
页码:1274 / 1277
页数:4
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