Magnon-mediated Binding between Holes in an Antiferromagnet
arXiv:cond-mat/0511367 · doi:10.1140/epjb/e2006-00398-y
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(2ϕ)/r^2 where r is the distance vector of the holes and ϕis 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. The role of these bound states as potential candidates for the preformed Cooper pairs of high-temperature superconductivity is discussed qualitatively.
4 pages, 3 figures
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- Microscopic Model versus Systematic Low-Energy Effective Field Theory for a Doped Quantum Ferromagnet
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- Thermodynamics of the =3+1 Quantum XY Model
- Random matrix model for antiferromagnetism and superconductivity on a two-dimensional lattice
- From the Hubbard Model to a Systematic Low-Energy Effective Field Theory for Magnons and Holes in an Antiferromagnet