Tricritical behaviour of Ising spin glasses with charge fluctuations

Details Tricritical behaviour of Ising spin glasses with charge fluctuations Tricritical behaviour of Ising spin glasses with charge fluctuations

1996-04-02

arxiv.org/abs/cond-mat/9604015v2

Phys. Rev. Lett. 77, 1608 (1996)

Physics

Condensed Matter

4 pages, 1 Postscript figure, minor changes

Scientific paper

10.1103/PhysRevLett.77.1608

We show that tricritical points displaying unusal behaviour exist in phase diagrams of fermionic Ising spin glasses as the chemical potential or the filling assumes characteristic values. Exact results for infinite range interaction and a one loop renormalization group analysis of thermal tricritical fluctuations for finite range models are presented. Surprising similarities with zero temperature transitions and a new $T=0$ tricritical point of metallic quantum spin glasses are derived.

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