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2002 | 102 | 3 | 401-407
Article title

The van Hove Singularity and Two-Dimensional Superconductivity. Exact Analytical Results

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EN
Abstracts
EN
We investigate a weak-coupling approach to superconductivity in the density of states that develops in the two-dimensional lattice with the van Hove singularity located at the Fermi level. Exact analytical expressions for the superconducting order parameter at zero temperature (Δ(0)) and for discontinuity in the specific heat at critical temperature (Δ C) were derived. We show that the presence of the logarithmic singularity hardly affects the ratio 2Δ(0)/kT_c, whereas the temperature dependence of Δ C can pronouncedly deviate from the standard BCS result.
Keywords
EN
Discipline
Publisher

Year
Volume
102
Issue
3
Pages
401-407
Physical description
Dates
published
2002-09
received
2001-10-08
(unknown)
2002-03-11
Contributors
  • Department of Theoretical Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
author
  • Silesian Academy of Medicine, Institute of Biophysics, 40-007 Katowice, Poland
References
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  • 6. R.S. Markiewicz, J. Phys. Chem. Solids, 58, 1179, 1997
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  • 8. S. Ratanaburi, P. Udomsamuthirun, S. Yoksan, J. Supercond., 9, 485, 1996; J.M. Getino, M. de Liano, H. Rubio, Phys. Rev. B, 48, 597, 1993
  • 9. A.L. Fetter, J.D. Walecka, Quantum Theory of Many-Particle Systems, McGraw-Hill, 1971
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv102n303kz
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