Magnon‐Induced O‐Hole Interaction in a pd t  J  Model for CuO 2  Superconductors | Zendy

Bryja L. | Zendy; Kolley E. | Zendy; Kolley W. | Zendy

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Magnon‐Induced O‐Hole Interaction in a pd t  J Model for CuO 2 Superconductors

Author(s) -

Bryja L.,

Kolley E.,

Kolley W.

Publication year - 1993

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2221770222

Subject(s) - brillouin zone , pairing , quasiparticle , condensed matter physics , physics , antiferromagnetism , superconductivity , magnon , vertex (graph theory) , mathematical physics , ferromagnetism , mathematics , combinatorics , graph

An effective model for O‐hole quasiparticles is derived from the t ˜ pp – J pd – J dd – J pp (or pd t J ) model stemming from the minimal version of the Emery model. The underlying procedure involves an antiferromagnetic (AF) Holstein‐Primakoff transformation, a Schrieffer‐Wolff transformation, and an AF Bogolyubov transformation. The investigation of the diagonal part of the effective vertex shows the dominance of the AF magnon‐mediated repulsion over the a priori attraction between O‐hole quasiparticles along the boundaries of the magnetic Brillouin zone. In view of the pairing, formal similarities to the spin‐bag mechanism are pointed out.

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