NONLINEAR SCREENING OF A TOTALLY OCCUPIED LANDAU-LEVEL

被引：4

作者：

MANOLESCU, A

机构：

[1] Institutul de Fizica Şi Tehnologia Materialelor, Bucureşti-Mogurele

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.45.11829

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The quadratic-response function of the particle density to a static harmonic potential is calculated for a totally occupied Landau level. Then, with use of a variational approach, it is shown that the linear component of the density response is dominant for any wave vector q of the external potential and for a large range of amplitudes, including those which remove the gap up to the next Landau level. The contribution of the nonlinear components does not exceed a few percent if q < l(B)-1 and may be statisfactorily described by the quadratic component if q < 2l(B)-1, where l(B) = (HBARc/eB)1/2 is the magnetic length.

引用

页码：11829 / 11836

页数：8

共 16 条

[1] METAL-NON-METAL TRANSITION IN HETEROSTRUCTURES WITH THICK SPACER LAYERS [J].

EFROS, AL .

SOLID STATE COMMUNICATIONS, 1989, 70 (03) :253-256

[2] DENSITY OF STATES OF 2D ELECTRON-GAS AND WIDTH OF THE PLATEAU OF IQHE [J].

EFROS, AL .

SOLID STATE COMMUNICATIONS, 1988, 65 (11) :1281-1284

[3] NON-LINEAR SCREENING AND THE BACKGROUND DENSITY OF 2DEG STATES IN MAGNETIC-FIELD [J].

EFROS, AL .

SOLID STATE COMMUNICATIONS, 1988, 67 (11) :1019-1022

[4] DIELECTRIC RESPONSE OF A TWO-DIMENSIONAL ELECTRON-GAS IN A QUANTIZING MAGNETIC-FIELD [J].

GERHARDTS, RR ;

GUDMUNDSSON, V .

SOLID STATE COMMUNICATIONS, 1988, 67 (09) :845-849

[5] LONGITUDINAL DIELECTRIC BEHAVIOR OF A TWO-DIMENSIONAL ELECTRON-GAS IN A UNIFORM MAGNETIC-FIELD [J].

GLASSER, ML .

PHYSICAL REVIEW B, 1983, 28 (08) :4387-4396

[6]

Gradshteyn I.S., 1965, TABLES OF INTEGRALS

[7] STATIC SHIELDING OF AN IMPURITY NEAR A SURFACE IN THE PRESENCE OF A MAGNETIC-FIELD [J].

GUMBS, G .

PHYSICAL REVIEW B, 1983, 27 (12) :7136-7143

[8] THERMODYNAMIC GREEN-FUNCTION THEORY OF QUANTUM MAGNETIC-FIELD EFFECTS IN THE DYNAMIC, NONLOCAL LONGITUDINAL DIELECTRIC-RESPONSE PROPERTIES OF A BOUNDED SOLID-STATE PLASMA [J].

HORING, NJM ;

YILDIZ, MM .

PHYSICAL REVIEW B, 1986, 33 (06) :3895-3920

[9]

HORING NJM, 1976, ANN PHYS-NEW YORK, V97, P216

[10] DIELECTRIC-CONSTANT OF A TWO-DIMENSIONAL ELECTRON-GAS WITH A PARTIALLY OCCUPIED LANDAU-LEVEL [J].

LABBE, J .

PHYSICAL REVIEW B, 1987, 35 (03) :1373-1379

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