Exact diagonalization studies of doped Heisenberg spin rings

Details Exact diagonalization studies of doped Heisenberg spin rings Exact diagonalization studies of doped Heisenberg spin rings

2004-06-24

arxiv.org/abs/cond-mat/0406592v1

Journal of Magnetism and Magnetic Materials, 290-291 (2005) 341-344

Physics

Condensed Matter

Strongly Correlated Electrons

3 pages, 2 figures, submitted to JMMM

Scientific paper

10.1016/j.jmmm.2004.11.256

Motivated by magnetization studies of the "telephon number compound" Sr_14Cu_24O_41 we investigate doped Heisenberg spin rings by means of complete numerical diagonalization of a Heisenberg Hamiltonian that depends parametrically on hole positions. A comparison with experimental magnetization data reveals rather accurate information about the screened electrostatic interaction between the charged holes on the ring which appears to be astonishingly strong.

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