Internal structure of a Landau band induced by a lateral superlattice: A glimpse of Hofstadter's butterfly

被引：90

作者：

Schlosser, T ^{[1
]}

Ensslin, K ^{[1
]}

Kotthaus, JP ^{[1
]}

Holland, M ^{[1
]}

机构：

[1] UNIV GLASGOW,DEPT ELECTR,GLASGOW G12 8QQ,LANARK,SCOTLAND

来源：

EUROPHYSICS LETTERS | 1996年 / 33卷 / 09期

关键词：

D O I：

10.1209/epl/i1996-00399-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Short-period square lateral superlattices are fabricated on a two-dimensional electron gas located close to the sample surface. For weak potential modulation, band conductivity dominates the low-field magnetoresistance leading to pronounced commensurability oscillations. For increasing potential modulation, band conductivity breaks down and scattering conductivity dominates indicating our beginning to resolve the internal structure of a Landau band. For strong potential modulation the maxima of the Shubnikov-de Haas oscillations split up into submaxima related to the number of flux quanta penetrating a unit cell.

引用

页码：683 / 688

页数：6

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