Diamagnetic Properties of Doped Antiferromagnets

Details Diamagnetic Properties of Doped Antiferromagnets Diamagnetic Properties of Doped Antiferromagnets

2002-03-25

arxiv.org/abs/cond-mat/0203519v1

published in Proc. of NATO ARW on Open Problems in Strongly Correlated Electron Systems (Bled 2000), edited by J. Bonca, P. Pr

Physics

Condensed Matter

Strongly Correlated Electrons

LaTeX, 3 pages, 6 figures

Scientific paper

Finite-temperature diamagnetic properties of doped antiferromagnets as modeled by the two-dimensional t-J model were investigated by numerical studies of small model systems. Two numerical methods were used: the worldline quantum Monte Carlo method with a loop cluster algorithm (QMC) and the finite-temperature Lanczos method (FTLM), yielding consistent results. The diamagnetic susceptibility introduced by coupling of the magnetic field to the orbital current reveals an anomalous temperature dependence, changing character from diamagnetic to paramagnetic at intermediate temperatures.

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