Volume: 21, Issues: 13-14(2007)
pp. 2313-2323 DOI: 10.1142/S0217979207043683
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| Title: |
FIVE POSSIBLE REASONS WHY HIGH-Tc SUPERCONDUCTIVITY IS STALLED |
| Author(s): |
M. GRETHER
Facultad de Ciencias, UNAM, 04510 México, DF, MexicoM. DE LLANO
H.H. Wills Physics Laboratory, University of Bristol, Bristol BS8 1TL, UK
Permanent address: Instituto de Investigaciones en Materiales, UNAM, Apdo. Postal 70-360, 04510 México, DF, Mexico
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| Abstract: |
Five commonly held premises considered questionable assumptions in the microscopic theory of superconductivity are discussed as possible reasons why the search appears to be stalled for a theoretical framework, admittedly ambitious, capable of predicting materials with critical temperatures Tc higher than the 1993 record of 164K in HgTlBaCaCuO (under pressure). We focus the dilemma as a whole in terms of a generalized Bose-Einstein condensation (GBEC) interpretation that includes and further extends BCS theory, as well as substantially enhancing its predicted Tcs within the electron-phonon mechanism producing pairing. The new GBEC model is an extension of the Friedberg-T.D. Lee 1989 boson-fermion BEC theory of high-Tc superconductors in that it includes hole pairs as well as electron pairs. |
| Keywords: |
Superconductivity; Bose-Einstein condensation; electron-phonon coupling
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