Superconducting fluctuations of the specific heat in the short wavelength fluctuation regime
Copyright policy )Superconducting fluctuations of the specific heat in the short wavelength fluctuation regime
AbstractEffects of the short wavelength fluctuations on the specific heat ΔC in a superconductor are studied within the scheme of the Aslamazov-Larkin (AL) theory. By imposing the momentum cutoff in the fluctuation spectrum, formulae for ΔC are derived in a layered system as well as in n-dimensional (nD) systems (n=1, 2 and 3). Formulae under a total-energy cutoff condition are also presented. It is found that ΔC is significantly suppressed at high-reduced temperatures in a similar manner as in the paraconductivity. Our formulae in 3D and layered systems may be better fitted to experiments on YBa2Cu3O7-δ crystals in a wider temperature region than the standard AL formulae without any cutoff effect.
Spectral cutoff, Specific heat, Physics and Astronomy(all), Superconducting fluctuation
Spectral cutoff, Specific heat, Physics and Astronomy(all), Superconducting fluctuation
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