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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- 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