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Specific heat and low-lying excitations in the mixed state for a type II superconductor

N. Nakai·P. Miranovic·M. Ichioka·K. Machida
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Abstract

Low temperature behavior of the electronic specific heat $C(T)$ in the mixed state is by the self-consistent calculation of the Eilenberger theory. In addition to $γT$-term ($γ$ is a Sommerfeld coefficient), $C(T)$ has significant contribution of $T^2$-term intrinsic in the vortex state. We identify the origin of the $T^2$-term as (i) V-shape density of states in the vortex state and (ii) Kramer-Pesch effect of vortex core shrinking upon lowering $T$. These results both for full-gap and line node cases reveal that the vortex core is a richer electronic structure beyond the normal core picture.

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N. Nakai, P. Miranovic, M. Ichioka, K. Machida. 2006-04-13. Specific heat and low-lying excitations in the mixed state for a type II superconductor. https://doi.org/10.1103/physrevb.73.172501

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