Phase transitions in quasi-one dimensional system with unconventional superconductivity
Abstract
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.
Keywords
Cite
@article{arxiv.1710.01668,
title = {Phase transitions in quasi-one dimensional system with unconventional superconductivity},
author = {Andrzej Ptok and Agnieszka Cichy and Karen Rodríguez and Konrad Jerzy Kapcia},
journal= {arXiv preprint arXiv:1710.01668},
year = {2018}
}
Comments
6 pages, 4 figures; submitted to Journal of Superconductivity and Novel Magnetism