Response: Magnon-Exchange Pairing and Superconductivity
Abstract
A recent suggestion by G. Chen and W. A. Goddard (1) for electron pairing in high temperature superconducting oxides reintroduced the concept of magnon exchange as a replacement for the standard Bardeen-Cooper-Schrieffer (BCS) phonon exchange (2). This suggestion received considerable attention because [on the basis of microscopic calculations (1, 3) for small clusters] it provided precise estimates of the various superconducting transition temperatures T_c in the cuprate ceramics and calculated an upper bound T^(max)_c = 232 K. We show that, within the Chen-Goddard mechanism, the estimates of T_c are incorrect because Chen and Goddard use an equation for T_c appropriate only for weak coupling and that their T^(max)_c is spurious, as there is no upper bound when the correct expression is used.
Additional Information
© 1989 American Association for the Advancement of Science. 31 October 1988; revised 3 January 1989; accepted 9 January 1989. The J in this paper is defined to be twice as big as in our convention.Additional details
- Alternative title
- Magnon-Exchange Pairing and Superconductivity
- Eprint ID
- 72940
- Resolver ID
- CaltechAUTHORS:20161219-110549551
- Created
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2016-12-19Created from EPrint's datestamp field
- Updated
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2021-11-11Created from EPrint's last_modified field