Strong Coulomb effects in hole-doped Heisenberg chains

J. Schnack ()

The European Physical Journal B: Condensed Matter and Complex Systems, 2005, vol. 45, issue 3, 311-315

Abstract: Substances such as the “telephone number compound” Sr 14 Cu 24 O 41 are intrinsically hole-doped. The involved interplay of spin and charge dynamics is a challenge for theory. In this article we propose to describe hole-doped Heisenberg spin rings by means of complete numerical diagonalization of a Heisenberg Hamiltonian that depends parametrically on hole positions and includes the screened Coulomb interaction among the holes. It is demonstrated that key observables like magnetic susceptibility, specific heat, and inelastic neutron scattering cross section depend sensitively on the dielectric constant of the screened Coulomb potential. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Date: 2005
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DOI: 10.1140/epjb/e2005-00200-x

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