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Cuprates: Back to the Fermi Surface

Published online by Cambridge University Press:  26 February 2011

D. M. Newns
Affiliation:
IBM Research Division, T. J. Watson Research Center P. O. Box 218, Yorktown Heights, NY 10598
C. C. Tsuei
Affiliation:
IBM Research Division, T. J. Watson Research Center P. O. Box 218, Yorktown Heights, NY 10598
P. C. Pattnaik
Affiliation:
IBM Research Division, T. J. Watson Research Center P. O. Box 218, Yorktown Heights, NY 10598
C. L. Kane
Affiliation:
IBM Research Division, T. J. Watson Research Center P. O. Box 218, Yorktown Heights, NY 10598
C. C. Chi
Affiliation:
IBM Research Division, T. J. Watson Research Center P. O. Box 218, Yorktown Heights, NY 10598
H. R. Krishnamurthy
Affiliation:
IBM Research Division, T. J. Watson Research Center P. O. Box 218, Yorktown Heights, NY 10598
M. Daumling
Affiliation:
IBM Research Division, T. J. Watson Research Center P. O. Box 218, Yorktown Heights, NY 10598
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Abstract

The cuprate superconductor problem is approached from the conventional metallic standpoint, valid at dopings near the Tc maximum and beyond. There is strong evidence that the Tc maximum corresponds to EF lying at a van Hove singularity, a special situation leading to Marginal Fermi Liquid behavior, and also to a minimum in the isotope shift, as observed. The superconducting properties are discussed in the light of phononic and electronic pairing models.

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