Susceptibilities of Sr(Cu_(1-x)Zn_x)_2O_3 Studied by Quantum Monte Carlo Simulation

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The effects of non-magnetic impurities randomly doped into a two-leg Heisenberg spin ladder are investigated. Using the continuous time quantum Monte Carlo loop algorithm we calculate the uniform and staggered susceptibilities of such a system. The obtained uniform susceptibility is well described in terms of an effective model of weakly interacting local moments induced by non-magnetic impurities for a 1% doping case, but not for higher concentrations. The staggered susceptibility however is significantly enhanced over that in the effective model already at 1% doping. Using a mean field approximation for the interladder coupling, we explain qualitatively the phase diagram of Sr(Cu_{1-x}Zn_x)_2O_3.
Some grammatical or typographical errors are corrected. 4 pages and 5 figures

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/148730

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9706123
 http://arxiv.org/abs/cond-mat/9706123
 J. Phys. Soc. Jpn. 66 (1997) 2580
 doi:10.1143/JPSJ.66.2580

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arXiv