Coherence Lengths for Superconductivity in the Two-Orbital Negative-U Hubbard Model

• Authors: G. Litak , T. Örd , K. Rägo , A. Vargunin
• Languages of publication: EN

Abstracts

EN

We study the peculiarities of coherency in the superconductivity of two-orbital system. The superconducting phase transition is caused here by the on-site intra-orbital attractions (negative-U Hubbard model) and inter-orbital pair-transfer interaction. The dependencies of critical and non-critical correlation lengths on interaction channels and band fillings are analyzed.

Keywords

EN

74.20.-z; 74.20.Mn; 74.25.-q

Discipline

• 74.20.-z: Theories and models of superconducting state
• 74.20.Mn: Nonconventional mechanisms
• 74.25.-q: Properties of superconductors

• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 4
• Pages: 747-751

Dates

published

2012-04

Contributors

author

G. Litak

• Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, PL-20618 Lublin, Poland

author

T. Örd

• Institute of Physics, University of Tartu, Tähe 4, 51010 Tartu, Estonia

author

K. Rägo

• Institute of Physics, University of Tartu, Tähe 4, 51010 Tartu, Estonia

author

A. Vargunin

• Institute of Physics, University of Tartu, Tähe 4, 51010 Tartu, Estonia

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Identifiers

DOI

10.12693/APhysPolA.121.747