On the Boson-Fermion resonant model on a lattice

被引：0

作者：

Micnas, R. ^{[1
]}

机构：

[1] Solid State Theory Division, Faculty of Physics, A. Mickiewicz University, Umultowska 85, Poznań,61-614, Poland

来源：

Philosophical Magazine | 2015年 / 95卷

关键词：

Statistical mechanics - Phase diagrams - Mixtures - Temperature;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We review briefly the properties of a mixture of mutually interacting bosons (bound electron pairs) and itinerant fermions on a lattice (the boson-fermion model). The calculations of the superconducting phase transition temperature (Tc) and the phase diagram are the main concern. The self-consistent T-matrix method is applied to determine the superconducting critical temperature from a pseudogap phase. The method takes into account the pairing fluctuations effects. The T-matrix results for Tc are given for a three-dimensional (3-D) cubic lattice with tight-binding dispersion of electrons and standard bosons, and they are also compared with those of the BCS- mean-field approximation. Our results describe the BCS-Bose-Einstein condensation crossover in the boson-fermion mixture with resonant interaction. The energy scales involved in the pseudogap formation are also analysed. © 2014 Taylor & Francis.

引用

页码：622 / 632