Doped Spin Ladder: Zhang-Rice Singlets or Rung-centred Holes?

Krzysztof Wohlfeld

doi:10.1063/1.2752006

Doped Spin Ladder: Zhang-Rice Singlets or Rung-centred Holes?

Strongly Correlated Electrons 2009-11-13 v1 Superconductivity

Authors: Krzysztof Wohlfeld

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Abstract

We formulate charge transfer model for a single doped spin ladder, relevant for the intrinsically doped plane of coupled spin ladders in Sr $_{3}$ Ca $_{11}$ Cu $_{24}$ O $_{41}$ . Assuming the presence of the experimentally observed charge order in the system we solve the model using Hartree-Fock approximation. Our results show the profound stability of the Zhang-Rice singlets with respect to other configurations of doped holes, in agreement with recent x-ray absorption measurements.

Keywords

spin ladder Zhang-Rice singlet charge transfer model Hartree-Fock approximation charge order Sr3Ca11Cu24O41

Cite

@article{arxiv.cond-mat/0701418,
  title  = {Doped Spin Ladder: Zhang-Rice Singlets or Rung-centred Holes?},
  author = {Krzysztof Wohlfeld},
  journal= {arXiv preprint arXiv:cond-mat/0701418},
  year   = {2009}
}

Comments

5 pages, 3 figures; to appear in: Lectures on the Physics of Highly Correlated Electron Systems XI, AIP (2007)

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