Role of the transverse field in inverse freezing in the fermionic Ising spin-glass model

Details Role of the transverse field in inverse freezing in the fermionic Ising spin-glass model Role of the transverse field in inverse freezing in the fermionic Ising spin-glass model

2008-03-18

arxiv.org/abs/0803.2687v3

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 3 figures, accepted for publication in PRB

Scientific paper

10.1103/PhysRevB.77.134422

We investigate the inverse freezing in the fermionic Ising spin-glass (FISG) model in a transverse field $\Gamma$. The grand canonical potential is calculated in the static approximation, replica symmetry and one-step replica symmetry breaking Parisi scheme. It is argued that the average occupation per site $n$ is strongly affected by $\Gamma$. As consequence, the boundary phase is modified and, therefore, the reentrance associated with the inverse freezing is modified too.

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