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

被引：7

作者：

Ptok, Andrzej ^{[1
,2
]}

Cichy, Agnieszka ^{[3
,4
]}

Rodriguez, Karen ^{[5
,6
]}

Kapcia, Konrad Jerzy ^{[1
,7
]}

机构：

[1] Polish Acad Sci, Inst Nucl Phys, Ul E Radzikowskiego 152, PL-31342 Krakow, Poland

[2] Marie Curie Sklodowska Univ, Inst Phys, Plac M Sklodowskiej Curie 1, PL-20031 Lublin, Poland

[3] Adam Mickiewicz Univ, Fac Phys, Solid State Theory Div, Ul Umultowska 85, PL-61614 Poznan, Poland

[4] Johannes Gutenberg Univ Mainz, Inst Phys, Staudingerweg 9, D-55099 Mainz, Germany

[5] Univ Valle, Dept Fis, Cali 25360, Colombia

[6] Ctr Bioinformat & Photon CiBioFi, Calle 13 100-00,Edificio 320 1069, Cali, Colombia

[7] Polish Acad Sci, Inst Phys, Aleja Lotnikow 32-46, PL-02668 Warsaw, Poland

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2018年 / 31卷 / 03期

关键词：

Attractive Hubbard model; FFLO superconductivity; Ground state; Phase diagram; Phase transition; LARKIN-OVCHINNIKOV STATE; EXTENDED HUBBARD-MODEL; HARTREE THEORY; BOUND-STATES; FERMI GASES; ANTIFERROMAGNETISM; SUPERFLUIDITY; CROSSOVER; DIAGRAMS; CECOIN5;

D O I：

10.1007/s10948-017-4366-0

中图分类号：

O59 [应用物理学];

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.

引用

页码：697 / 702

页数：6

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