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Magnon-mediated binding between holes in an antiferromagnet

Brügger, C. ; Kämpfer, F. ; Pepe, M. ; Wiese, U.-J

In: The European Physical Journal B - Condensed Matter and Complex Systems, 2006, vol. 53, no. 4, p. 433-437

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    Titre
    • Magnon-mediated binding between holes in an antiferromagnet
    Auteur
    • Brügger, C.. Institute for Theoretical Physics, Bern University, Sidlerstrasse 5, 3012, Bern, Switzerland
    • Kämpfer, F.. Institute for Theoretical Physics, Bern University, Sidlerstrasse 5, 3012, Bern, Switzerland
    • Pepe, M.. Istituto Nazionale di Fisica Nucleare and Dipartimento di Fisica, Università di Milano-Bicocca, 3 Piazza della Scienza, 20126, Milano, Italy
    • Wiese, U.-J. Institute for Theoretical Physics, Bern University, Sidlerstrasse 5, 3012, Bern, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • The European Physical Journal B - Condensed Matter and Complex Systems, 2006, vol. 53, no. 4, p. 433-437. EDP Sciences
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:314506
    Summary
    Abstract.: The long-range forces between holes in an antiferromagnet are due to magnon exchange. The one-magnon exchange potential between two holes is proportional to cos(2 ϕ)/r 2 where r is the distance vector of the holes and ϕ is the angle between r and an axis of the square crystal lattice. One-magnon exchange leads to bound states of holes with antiparallel spins resembling d-wave symmetry