Localization Exponent for the Second Landau Level in the Quantum Hall Effect  

作　　者：涂涛 赵勇杰 郝晓杰 汪成友 郭光灿 郭国平 

机构地区：[1]Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026

出　　处：《Chinese Physics Letters》2008年第3期1083-1086,共4页中国物理快报（英文版）

基　　金：Supported by the International Partnership Project of Chinese Academy of Sciences, the National Basic Research Programme of China, the Knowledge Innovation Project of Chinese Academy of Sciences, and the National Natural Science Foundation of China under Grant Nos 60121503 and 10604052. We thank Professor H. W. Jiang （UCLA）, Professor R. R. Du （Rice）, Professor D. N. Sheng （CSU）, and Dr Y. Chen （Princeton） for helpful discussions.

摘　　要：At temperature above 1 K, we measured the temperature dependence of the longitudinal and Hall resistivity ρxx,ρxy in the regime of the quantum Hall plateau-to-plateau transitions. The localization exponent v is extracted with an approach based on the variable range hopping theory. We find the quantity v ≈ 2.3 at the second Landau level, which is proven to be accurately universal.At temperature above 1 K, we measured the temperature dependence of the longitudinal and Hall resistivity ρxx,ρxy in the regime of the quantum Hall plateau-to-plateau transitions. The localization exponent v is extracted with an approach based on the variable range hopping theory. We find the quantity v ≈ 2.3 at the second Landau level, which is proven to be accurately universal.

关 键 词：STRONG MAGNETIC-FIELD DELOCALIZATION TRANSITION CONDUCTIVITY PERCOLATION BEHAVIOR 

分 类 号：O413[理学—理论物理]