Phase Transitions in Quasi-One-Dimensional System with Unconventional Superconductivity

被引：0
|
作者：
Andrzej Ptok
Agnieszka Cichy
Karen Rodríguez
Konrad Jerzy Kapcia
机构：
[1] Polish Academy of Sciences,Institute of Nuclear Physics
[2] Maria Curie-Skłodowska University,Institute of Physics
[3] Adam Mickiewicz University in Poznań,Solid State Theory Division, Faculty of Physics
[4] Johannes Gutenberg-Universität Mainz,Institut für Physik
[5] Universidad del Valle,Departamento de Física
[6] Centre for Bioinformatics and Photonics – CiBioFi,Institute of Physics
[7] Polish Academy of Sciences,undefined
来源：
Journal of Superconductivity and Novel Magnetism | 2018年 / 31卷
关键词：
Attractive Hubbard model; FFLO superconductivity; Ground state; Phase diagram; Phase transition;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The paper is devoted to a study of superconducting properties of population-imbalanced fermionic mixtures in quasi-one-dimensional optical lattices. The system can be effectively described by the attractive Hubbard model with the Zeeman magnetic field term. We investigated the ground-state phase diagram of the model as a function of the chemical potential and the magnetic field. The ground state of the system exhibits the conventional BCS-type superconductivity as well as the unconventional so-called Fulde-Ferrell-Larkin-Ovchinnikov state, in which the total momentum of Cooper pairs is non-zero. We determine the orders of transitions as well as the behavior of order parameters with a change of the model parameters.
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页码：697 / 702
页数：5
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