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How to detect gap nodes of a superconductor by angle-resolved specific heat experiment?

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

The specific heat oscillation in the mixed state of type II superconductors is studied theoretically when rotating field within a plane containing gap minimum and maximum. The calculations are performed microscopically by solving quasi-classical Eilenberger equation for vortex lattices. The field dependence of the oscillation amplitude can discriminate between the nodal and anisotropic gap with a finite minimum and the oscillation phase gives the gap minimum position on the Fermi surface. These also provide a way to separate out the anisotropic behavior due to the Fermi velocity.

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P. Miranovic, M. Ichioka, K. Machida, N. Nakai. 2004-09-14. How to detect gap nodes of a superconductor by angle-resolved specific heat experiment?. https://arxiv.org/abs/cond-mat/0409371

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