SUBBANDS AND CORRELATION-EFFECTS ON PLASMON-EXCITATIONS IN QUASI-ONE-DIMENSIONAL QUANTUM-WELL WIRES

被引：8

作者：

BORGES, AN

DEGANI, MH

HIPOLITO, O

机构：

[1] Departamento de Física e Ciência dos Materiais, Instituto de Física e Química, São Carlos Universidade de São Paulo, 13560 Sao Carlos, Sao Paulo

来源：

SUPERLATTICES AND MICROSTRUCTURES | 1993年 / 13卷 / 01期

关键词：

D O I：

10.1006/spmi.1993.1010

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The plasmon excitations in quasi-one-dimensional quantum-well wires (QWW) are calculated by using the self-consistent-field approximation theory proposed by Singwi, Tosi, Land and Sjölander (STLS). A multisubband model is used in order to investigate the inter- and intra-subband excitations. We present results for the effective potential, structure factor, pair-correlation function and the plasmon dispersion as a function of the wire thickness and the electronic density. The random-phase approximation (RPA) results are also presented for comparison and a sizable deviation from STLS is found. We show that exchange and correlation effects are quite important for a quasi-one-dimensional electron gas and when multiple subbands are populated an additional plasmon like intersubband mode exists. © 1993 Academic Press. All rights reserved.

引用

页码：51 / 54

页数：4

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