Phonon structure in tunneling conductance as a possible key to the mechanism of high-{Tc} superconductivity
- National Academy of Sciences of Ukraine, Donetsk (Ukraine). A.Galkin Physico-Technical Inst.
An influence of anisotropy on phonon structure in d{sup 2}I/dV{sup 2}(V) curve was examined by direct solving of the Eliashberg equations. The studies include the s- and d- types of pairing symmetry as well as scattering on impurities. As is revealed the phonon structure in the second derivative remains isotropic and should be found at eV = {bar h}{omega} + <{Delta}> where {omega} is the phonon frequency and the effective gap <{Delta}> is close to the maximum value of {Delta}(k) in the case of strong anisotropy of energy gap {Delta}(k). The smearing of phonon structure could be taken into account by using a complex gap function {Delta}({omega} + i{Lambda}) in the Dynes` formula. The influence of the localized states on the phonon structure in d{sup 2}I/dV{sup 2} is discussed.
- OSTI ID:
- 549834
- Report Number(s):
- CONF-960163--; ISBN 0-8194-2070-0
- Country of Publication:
- United States
- Language:
- English
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