CONDUCTANCE MODULATION IN DOUBLE-QUANTUM WELLS DUE TO MAGNETIC-FIELD-INDUCED ANTICROSSING

被引：96

作者：

SIMMONS, JA ^{[1
]}

LYO, SK ^{[1
]}

HARFF, NE ^{[1
]}

KLEM, JF ^{[1
]}

机构：

[1] OREGON STATE UNIV,CORVALLIS,OR 97331

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.73.2256

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We observe a strong modulation of the low temperature in-plane conductance G(parallel to) of coupled quantum wells (QW's) by an in-plane magnetic field Bit and attribute this to an anticrossing of the two QW dispersion curves. The anticrossing produces a partial energy gap, yielding large, B-parallel to-tunable distortions in the Fermi surface and density of states. Sweeping B-parallel to moves the energy gap through the Fermi level, with the upper and lower gap edges producing a sharp maximum and minimum in G(parallel to), in agreement with theoretical calculations. The gap energy is directly determined from the data.

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页码：2256 / 2259

页数：4

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