On the Phase Diagram of Spin-Polarized Attractive Hubbard Model: Weak Coupling Limit |
| A. Kujawa and R. Micnas
Solid State Theory Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland |
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| Received: 6 11 2007; |
| The superfluid properties of the attractive Hubbard model in a Zeeman magnetic field, and in the weak coupling regime were investigated. The temperature and magnetic field dependences of the order parameter were analyzed. Furthermore, the temperature vs. magnetic field and temperature vs. spin polarization phase diagrams for the 2D and 3D lattices were obtained. For some parameters a reentrant transition was found. |
| DOI: 10.12693/APhysPolA.114.43 PACS numbers: 71.10.Fd, 74.20.Rp, 71.27.+a, 71.10.Hf |