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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
  • 27
    Citations
  • 0
    Usage
  • 2
    Captures
  • 0
    Mentions
  • 0
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    27
    • Citation Indexes
      27
  • Captures
    2

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.

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