Valley susceptibility of an interacting two-dimensional electron system

被引：277

作者：

Gunawan, O. ^{[1
]}

Shkolnikov, Y. P. ^{[1
]}

Vakili, K. ^{[1
]}

Gokmen, T. ^{[1
]}

De Poortere, E. P. ^{[1
]}

Shayegan, M. ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.97.186404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report direct measurements of the valley susceptibility, the change of valley population in response to an applied symmetry-breaking strain, in an AlAs two-dimensional electron system. As the two-dimensional density is reduced, the valley susceptibility dramatically increases relative to its band value, reflecting the system's strong electron-electron interaction. The increase has a remarkable resemblance to the enhancement of the spin susceptibility and establishes the analogy between the spin and valley degrees of freedom.

引用

页数：4

共 19 条

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