Effect of Strain on Stripe Phases in the Quantum Hall Regime

被引：47

作者：

Koduvayur, Sunanda P. ^{[1
,2
]}

Lyanda-Geller, Yuli ^{[1
,2
]}

Khlebnikov, Sergei ^{[1
,2
]}

Csathy, Gabor ^{[1
,2
]}

Manfra, Michael J. ^{[1
,2
,3
,4
]}

Pfeiffer, Loren N. ^{[5
]}

West, Kenneth W. ^{[5
]}

Rokhinson, Leonid P. ^{[1
,2
]}

机构：

[1] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA

[2] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA

[3] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA

[4] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA

[5] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 01期

基金：

英国工程与自然科学研究理事会; 美国国家科学基金会;

关键词：

HIGH LANDAU-LEVELS; 2-DIMENSIONAL ELECTRON LIQUID; WEAK MAGNETIC-FIELD; ANISOTROPIC TRANSPORT; DENSITY; STATES; SEMICONDUCTORS; TEMPERATURE; MECHANISMS; SYSTEMS;

D O I：

10.1103/PhysRevLett.106.016804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Preferential orientation of the stripe phases in the quantum Hall (QH) regime has remained a puzzle since its discovery. We show experimentally and theoretically that the direction of high and low resistance of the two-dimensional (2D) hole gas in the QH regime can be controlled by an external strain. Depending on the sign of the in-plane shear strain, the Hartree-Fock energy of holes or electrons is minimized when the charge density wave (CDW) is oriented along the [110] or [1 (1) over bar0] directions. We suggest that shear strains due to internal electric fields in the growth direction are responsible for the observed orientation of CDW in pristine electron and hole samples.

引用

页数：4

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