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Image of the Energy Gap Anisotropy in the Vibrational Spectum of a High Temperature Superconductor

Michael E. Flatte
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Abstract

We present a new method of determining the anisotropy of the gap function in layered high-Tc superconductors. Careful inelastic neutron scattering measurements at low temperature of the phonon dispersion curves in the (100) direction in La_(1.85)Sr_(.15)CuO_4 would determine whether the gap is predominately s-wave or d-wave. We also propose an experiment to determine the gap at each point on a quasi-two-dimensional Fermi surface.

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Michael E. Flatte. 1992-04-21. Image of the Energy Gap Anisotropy in the Vibrational Spectum of a High Temperature Superconductor. https://doi.org/10.1103/physrevlett.70.658

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