Specific Heat Jump at Tc of High Tc Superconductors: Effect of Van Hove Singularity |
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| Authors: | B Krunavakarn S Kaskamalas N Jinuntuya and S Yoksan |
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| Affiliation: | (1) Department of Physics, Chulalongkorn University, Bangkok, 10300, Thailand;(2) Department of Physics, Kasetsart University, Bangkok, 10900, Thailand;(3) Department of Physics, Srinakharinwirot University, Bangkok, 10110, Thailand |
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| Abstract: | In the BCS framework, exact expressions for the ratio between the jump in the specific heat at T
c
and the normal phase specific heat are derived within the Van Hove singularity scenario. Analytical results are obtained for an isotropic s-wave and anisotropic d-wave pairing symmetries. Graphical solutions of the ratio as functions of 
D
/T
c
and E
F
/T
c
, where
D
is the cutoff energy and E
F
is the Fermi energy, show significant deviations from the BCS value of 1.43. |
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| Keywords: | specific heat jump s d pairing symmetry Van Hove superconductor |
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