On the Phase Diagram of Spin-Polarized Attractive Hubbard Model: Weak Coupling Limit

TL;DR

This paper investigates the superfluid phase diagram of the weakly coupled attractive Hubbard model under a Zeeman magnetic field, revealing phase transitions and reentrant behavior in 2D and 3D lattices.

Contribution

It provides a detailed analysis of the temperature and magnetic field dependence of superfluid properties, including phase diagrams and reentrant transitions, in the weak coupling regime.

Findings

Reentrant transition observed in phase diagrams.

Phase diagrams constructed for 2D and 3D lattices.

Temperature and magnetic field significantly influence superfluid properties.

Abstract

The superfluid properties of the attractive Hubbard model in a Zeeman magnetic field, and in the weak coupling regime have been investigated. The temperature and magnetic field dependencies of the order parameter have been analyzed. Furthermore, the temperature vs. magnetic field and temperature vs. spin polarization phase diagrams for the 2D and 3D lattices have been obtained. For some parameters a reentrant transition has been found.