Detection of a Landau band-coupling-induced rearrangement of the Hofstadter butterfly

被引：106

作者：

Geisler, MC ^{[1
]}

Smet, JH

Umansky, V

von Klitzing, K

Naundorf, B

Ketzmerick, R

Schweizer, H

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] Weizmann Inst Sci, Braun Ctr Submicron Res, IL-76100 Rehovot, Israel

[3] Max Planck Inst Stromungsforsch, D-37073 Gottingen, Germany

[4] Tech Univ Dresden, Inst Theoret Phys, D-01062 Dresden, Germany

[5] Univ Stuttgart, Inst Phys 4, D-70550 Stuttgart, Germany

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.92.256801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The spectrum of 2D electrons subjected to a weak 2D potential and a perpendicular magnetic field is composed of Landau bands with a fractal internal pattern of subbands and minigaps referred to as Hofstadter's butterfly. The Hall conductance may serve as a spectroscopic tool as each filled subband contributes a specific quantized value. Advances in sample fabrication now finally offer access to the regime away from the limiting case of a very weak potential. Complex behavior of the Hall conductance is observed and assigned to Landau band-coupling-induced rearrangements within the butterfly.

引用

页码：256801 / 1

页数：4

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