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Theory of NMR and specific heat for extended s-wave and d-wave pairing states in high Tc superconductors

✍ Scribed by C.T. Rieck; D. Fay; L. Tewordt

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
296 KB
Volume
165-166
Category
Article
ISSN
0921-4526

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✦ Synopsis

We solve the Eliashberg equations exactly for anisotropic interactions projected onto extended s-wave and d-wave states. The resulting density of states for a gap with nodes (s-or d-wave) yields a nuclear spin relaxation rate which has almost no Hebel-Slichter peak. We calculate ~F, He, and ~C for different coupling constants and Einstein spectra of the isotropic and anisotropic interactions. The specific heat jump ~C can be large and sharp compared to BCS theory. We conclude that gaps having nodes yield better agreement with experiments on high-T c superconductors.

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In TIT e 1.1

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