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Orientational field-dependence of low-lying excitations in mixed state of unconventional superconductors

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

Orientational field-dependence of the zero energy density of states (ZEDOS) is calculated for superconductors with the polar state (line node), axial state (point node) and 3D d-wave state. Depending on the gap topology and relative field direction the field dependencies of ZEDOS sensitively differ, providing us a useful and practical method to identify the gap topology. It is also demonstrated that for d-wave state the field rotation in the basal plane shows a sizable oscillation ~3% of ZEDOS. This is directly measurable in low-T specific heat experiment in the mixed state.

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P. Miranovic, N. Nakai, M. Ichioka, K. Machida. 2003-02-19. Orientational field-dependence of low-lying excitations in mixed state of unconventional superconductors. https://doi.org/10.1103/physrevb.68.052501

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