Reentrant Fulde-Ferrell-Larkin-Ovchinnikov superfluidity in the honeycomb lattice

被引：11

作者：

Cichy, Agnieszka ^{[1
,2
]}

Ptok, Andrzej ^{[3
]}

机构：

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

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

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

来源：

PHYSICAL REVIEW A | 2018年 / 97卷 / 05期

关键词：

ELECTRONIC-STRUCTURE; PHASE-TRANSITIONS; CRITICAL FIELD; HUBBARD-MODEL; SUPERCONDUCTIVITY; STATES; SEPARATION; CROSSOVER; DEVICE; SPINS;

D O I：

10.1103/PhysRevA.97.053619

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study superconducting properties of population-imbalanced ultracold Fermi mixtures in the honeycomb lattice that can be effectively described by the spin-imbalanced attractive Hubbard model in the presence of a Zeeman magnetic field. We use the mean-field theory approach to obtain ground-state phase diagrams including the unconventional Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase, which is characterized by atypical behavior of the Cooper-pair total momentum. We show that the momentum changes its value as well as direction with a change of the system parameters. We discuss the influence of Van Hove singularities on the possibility of the reentrant FFLO phase occurrence, without a BCS precursor.

引用

页数：11

共 97 条

[81] BEC-BCS crossover in "Magnetized" feshbach-resonantly paired superfluids - art. no. 060401 [J].