| How to detect gap nodes of a superconductor by angle-resolved specific heat experiment? (2004) | |||||||||
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.. Comment: 6 pages, 4 figures | |||||||||
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