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

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

2007-01-17

arxiv.org/abs/cond-mat/0701418v1

Lectures on the Physics of Strongly Correlated Systems XI, eds. F. Mancini and A. Avella, AIP Conference Proceedings Vol. 918,

Physics

Condensed Matter

Strongly Correlated Electrons

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

Scientific paper

10.1063/1.2752006

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.

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