Asymptotically exact dispersion relations for collective modes in a confined charged Fermi liquid

被引：2

作者：

Tokatly, IV ^{[1
]}

Pankratov, O ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Lerhrstuhl Theoret Festkorperphys, D-91058 Erlangen, Germany

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.66.153103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using general local conservation laws we derive dispersion relations for edge modes in a slab of electron liquid confined by a symmetric potential. The dispersion relations are exact up to lambda(2)q(2), where q is a wave vector and lambda is an effective screening length. For a harmonic external potential the dispersion relations are expressed in terms of the exact static pressure and dynamic shear modulus of a homogeneous liquid with the density taken at the slab core. We also derive a simple expression for the frequency shift of the dipole (Kohn) modes in nearly parabolic quantum dots in a magnetic field.

引用

页码：1 / 4

页数：4

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