Specific Heat Jump at T<Emphasis Type="Italic">c</Emphasis> of High T<Emphasis Type="Italic">c</Emphasis> Superconductors: Effect of Van Hove Singularity |
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| Authors: | B Krunavakarn S Kaskamalas N Jinuntuya S Yoksan |
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| Affiliation: | 1.Department of Physics,Chulalongkorn University,Bangkok,Thailand;2.Department of Physics,Kasetsart University,Bangkok,Thailand;3.Department of Physics,Srinakharinwirot University,Bangkok,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 ω D /T c and E F /T c , where ω 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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