DYNAMIC CONDUCTIVITY OF THE 2-DIMENSIONAL BOSE CONDENSATE - SUPERFLUID-INSULATOR TRANSITION FOR A LONG-RANGE RANDOM POTENTIAL

被引：9

作者：

GOLD, A

机构：

[1] Laboratoire de Physique des Solides, Université Paul Sabatier, Toulouse, F-31062

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1992年 / 87卷 / 02期

关键词：

D O I：

10.1007/BF01315645

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We calculate the dynamical conductivity of a disordered charged Bose condensate in two dimensions with a long-range random potential due to charged impurities with a large spacer width alpha. Analytical results for the frequency-dependent conductivity for weak disorder are derived. For strong disorder the frequency-dependent conductivity is given in terms of a transcendental equation. The disorder-induced transition from a superfluid phase to an insulator phase is discussed. The density-density relaxation function and the screening properties of the disordered Bose gas are calculated. Experimental results for high-T(c) superconductors are discussed.

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页码：169 / 181

页数：13

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