Possible Jahn-Teller effect in Si inverse layers

被引：2

作者：

Brener, S ^{[1
]}

Iordanski, SV ^{[1
]}

Kashuba, A ^{[1
]}

机构：

[1] Russian Acad Sci, LD Landau Theoret Phys Inst, Moscow 119334, Russia

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.67.125309

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Jahn-Teller effect in a bivalley Si(100) heterostructure under conditions of the quantum Hall effect at integer filling factors nu=1, 2, and 3 is studied. This system is described by an SU(4) hidden symmetry. At nu=2 static and dynamic lattice deformations give rise to an easy-plane anisotropy and an antiferromagnetic exchange, and lift the valley degeneracy. At nu=1, and 3 Coulomb interaction is essential to produce a weak easy-plane anisotropy. At nu=2 three phases, ferromagnetic, canted antiferromagnetic, and spin-singlet, have been found. The anisotropy energy of charged skyrmion excitation in every phase is calculated.

引用

页数：8

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