Spin susceptibility of interacting two-dimensional electrons with anisotropic effective mass

被引：29

作者：

Gokmen, T. ^{[1
]}

Padmanabhan, Medini ^{[1
]}

Tutuc, E. ^{[1
]}

Shayegan, M. ^{[1
]}

De Palo, S. ^{[2
,3
]}

Moroni, S. ^{[2
,4
]}

Senatore, Gaetano ^{[2
,3
]}

机构：

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

[2] Natl Simulat Ctr, INFM CNR DEMOCRITOS, Trieste, Italy

[3] Univ Trieste, Dipartimento Fis Teor, I-34014 Trieste, Italy

[4] SISSA, Int Sch Adv Studies, I-34014 Trieste, Italy

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.76.233301

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report measurements of the spin susceptibility in dilute (r(s) up to approximate to 10) AlAs two-dimensional (2D) electrons occupying a single conduction-band valley with an anisotropic in-plane Fermi contour, characterized by longitudinal and transverse effective masses m(l) and m(t). As the density is decreased, the spin susceptibility is significantly enhanced over its band value, reflecting the role of interaction. Yet the enhancement is suppressed compared to the results of quantum Monte Carlo based calculations that take the finite thickness of the electron layer into account but assume an isotropic effective mass equal to root m(l).m(t). Proper treatment of an interacting 2D system with an anisotropic effective mass therefore remains a theoretical challenge.

引用

页数：4

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