SUPERCONDUCTIVITY IN 2+1 DIMENSIONS WITHOUT PARITY OR TIME-REVERSAL VIOLATION

被引：85

作者：

DOREY, N ^{[1
]}

MAVROMATOS, NE ^{[1
]}

机构：

[1] UNIV OXFORD,DEPT THEORET PHYS,OXFORD OX1 3NP,ENGLAND

来源：

PHYSICS LETTERS B | 1990年 / 250卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(90)91162-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A model of dynamical holes in a planar quantum antiferromagnet is analysed in the limit of large spin and small doping concentration. The long-wavelength limit of this system is found to be a relativistic QFT of multiflavour Dirac fermions with both four-fermion and statistical chiral gauge interactions. The Schwinger-Dyson equation for the fermion self-energy is solved in the limit of many flavours and the theory is found to possess a phase in which the global vector symmetry of the effective action is realised in the Kosterlitz-Thouless mode. The theory exhibits superconductivity without parity or time-reversal violation in this phase and the charge quantum assumes the phenomenologically relevant value of 2e. The mechanism is conjectured to be "hole-pair" condensation due primarily to the statistical gauge interaction. Although there is a formal similarity with BCS theory the physical origin of the attraction between holes is quite different. The model may provide a prototype for further studies in realistic microscopic systems that attempt to simulate planar high temperature superconducting oxides. © 1990.

引用

页码：107 / 116

页数：10

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