Tricritical behaviour of Ising spin glasses with charge fluctuations
Abstract
We show that tricritical points displaying unusal behaviour exist in phase diagrams of fermionic Ising spin glasses as the chemical potential or the filling assume 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 of metallic quantum spin glasses are described.Keywords
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