Tunneling-driven quantum phase transitions in mesoscopic commensurate systems

被引：1
|
作者：
Bâldea, I [1 ]
Köppel, H
Cederbaum, LS
机构：
[1] Univ Karlsruhe, TH, Inst Phys, D-76129 Karlsruhe, Germany
[2] Univ Heidelberg, Inst Phys Chem, D-69120 Heidelberg, Germany
[3] Natl Inst Lasers Plasmas & Radiat Phys, Inst Space Sci, Bucharest, Romania
来源：
SYNTHETIC METALS | 2001年 / 119卷 / 1-3期
关键词：
other phase transitions; quantum wells; semi-empirical models and model calculations; optical absorption;
D O I：
10.1016/S0379-6779(00)01181-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We demonstrate here that new phenomena can occur in mesoscopic commensurate systems of strongly correlated electrons: tunneling-driven quantum phase transitions. To exemplify, we present CDW-to-CDW (SDW-to-SDW) transitions between charge (spin) density wave states of different symmetries in quantum rings described by an extended Hubbard model. Thesde transitions can be studied experimentally e.g. by optical absorption.
引用
收藏
页码：561 / 562
页数：2
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