Phase Diagram of a Superconducting and Antiferromagnetic System with SO(5) Symmetry

Preprint

2 December 1998

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9812031

Abstract

Temperature vs. chemical-potential phase diagrams of an SO(5) model for high-(T_c) cuprates are calculated by Monte Carlo simulation. There is a bicritical point where the second-order antiferromagnetism (AF) and superconductivity transition lines merge tangentially into a first-order line, and the SO(5) symmetry is achieved. In an external magnetic field, the AF ordering is first order in the region where the first-order melting line of flux lattice joins in. There is a tricritical point on the AF transition line from which the AF ordering becomes second order.

Keywords

ANTIFERROMAGNETIC SYSTEM
MONTE CARLO SIMULATION
SYMMETRY TEMPERATURE
ANTIFERROMAGNETISM
SUPERCONDUCTING
MAGNETIC FIELD
PHASE DIAGRAM
AF ORDERING

All Related Versions

Version 1, 1998-12-02, ArXiv
Published version: Physical Review Letters, 82 (12), 2568.

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