Parity of the order parameter in high-temperature superconductors with respect to a {pi}/2 rotation

Journal Article · Fri Dec 01 00:00:00 EST 1995 · Physical Review, B: Condensed Matter

OSTI ID:147765

Abrikosov, A A ^[1]

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1. Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)

In order to establish the parity of the order parameter in the model based on the idea of a strong phonon-mediated long-range attraction, enhanced by the extended saddle-point singularities in the electron spectrum, plus a weak short-range repulsion, a comparison of critical temperatures and free energies of the even and odd solutions for the order parameter is performed. A criterion is established distinguishing the two options. It is shown, particularly, that superconductivity, induced by phonons, can, nevertheless, lead to an odd order parameter. On the other hand, contrary to the previous statements, this is the only possibility for the order parameter to change its sign within this model. The theory is influenced by the latest experimental results.

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 147765
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 22 Vol. 52; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ELECTRON SPECTRA
ELECTRON-PHONON COUPLING
HIGH-TC SUPERCONDUCTORS
ORDER PARAMETERS
PARITY
SINGULARITY