Influence of the Van Hove Singularity on the Specific Heat Jump in BCS Superconductors-Reference-Cited by-同舟云学术

Influence of the Van Hove Singularity on the Specific Heat Jump in BCS Superconductors

Published:2003-06-20 Issue:13n14 Volume:17 Page:755-762
ISSN:0217-9849
Container-title:Modern Physics Letters B
language:en
Short-container-title:Mod. Phys. Lett. B

Author:

Mishonov Todor¹²,Drechsler Stefan-Ludwig³,Penev Evgeni²

Affiliation:

1. Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium

2. Department of Theoretical Physics, Faculty of Physics, Sofia University, "St. Kliment Ohridski", 5 J. Bourchier Blvd., 1164 Sofia, Bulgaria

3. Institut für Festkörper- und Werkstofforshung Dresden, D-001171 Dresden, Germany

Abstract

Within the weak-coupling BCS scheme we derive a general form of the coefficients in the Ginzburg–Landau expansion of the free energy of a superconductor for the case of a Fermi level close to a Van Hove singularity (VHS). A simple expression for the influence of the VHS on the specific heat jump is then obtained for the case where gaps for different bands are distinct but nearly constant at the corresponding sheets of the Fermi surface.

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,Statistical and Nonlinear Physics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0217984903005299

Reference6 articles.

1. Bardeen-Cooper-Schrieffer Theory of Superconductivity in the Case of Overlapping Bands

2. High-temperature superconductivity and the characteristics of the electronic energy spectrum

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