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

Journal Article · Thu Mar 15 00:00:00 EDT 2018 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-017-4366-0· OSTI ID:22777026

Ptok, Andrzej ^[1]; Cichy, Agnieszka ^[2]; Rodríguez, Karen ^[3]

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1. Polish Academy of Sciences, Institute of Nuclear Physics (Poland)
2. Adam Mickiewicz University in Poznań, Solid State Theory Division, Faculty of Physics (Poland)
3. Universidad del Valle, Departamento de Física (Colombia)

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.

• OSTI ID: 22777026
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 31, Issue 3; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; Article Copyright (c) 2017 The Author(s); http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COOPER PAIRS
FERMIONS
GROUND STATES
HUBBARD MODEL
MAGNETIC FIELDS
ONE-DIMENSIONAL CALCULATIONS
ORDER PARAMETERS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
POTENTIALS
SUPERCONDUCTIVITY
ZEEMAN EFFECT