Quasiparticle band structure of a hole in a quantum Heisenberg antiferromagnet
Physical Review B, ISSN: 0163-1829, Vol: 47, Issue: 2, Page: 1103-1106
1993
- 27Citations
- 2Captures
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Article Description
The problem of the single-hole motion in a two-dimensional quantum Heisenberg antiferromagnet is examined in the t-J model. By introducing a kind of slave-fermion representation for Hubbard operators a hole is treated as a spinless fermion strongly interacting with spin-1/2 degrees of freedom. We suggest an analytic approach based on a decoupling procedure for two-time fermionic Green functions that allows us to describe a hole as a magnetic polaron of a minimal size (i.e., involving one-step string spin excitations) and reproduce the main features characteristic of a one-hole band in a quantum antiferromagnet. A generalization of the procedure in the spirit of the Lanczos approach to extend the internal structure of the magnetic polaron is discussed. © 1993 The American Physical Society.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0007457942&origin=inward; http://dx.doi.org/10.1103/physrevb.47.1103; http://www.ncbi.nlm.nih.gov/pubmed/10005595; https://link.aps.org/doi/10.1103/PhysRevB.47.1103; http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.47.1103/fulltext; http://link.aps.org/article/10.1103/PhysRevB.47.1103
American Physical Society (APS)
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