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Title: Numerical study of critical properties and hidden orders in dimerized spin ladders
Authors: Gibson, Sandra J.
Meyer, Ralf
Chitov, Gennady Y.
Keywords: Quantum spin systems;Spin chain models
Issue Date: 29-Mar-2011
Publisher: American Physical Society
Citation: Sandra J. Gibson, R. Meyer, Gennady Y. Chitov, Numerical study of critical properties and hidden orders in dimerized spin ladders, Phys. Rev. B 104423 (2011).
Abstract: Dimerized antiferromagnetic spin-1 ladders are known to exhibit a quantum critical phase transition in the 2 ground state, the existence or absence of which is dependent on the dimerization pattern of the ladder. The gapped phases cannot be distinguished by the conventional Landau long-range order parameter. However, they possess a nonlocal (hidden) string-order parameter, which is nonzero in one phase and vanishes in the other. We use an exact diagonalization technique to calculate ground-state energies, energy gaps, and string-order parameters of dimerized two- and three-leg Heisenberg ladders, as well as a critical scaling analysis to yield estimates of the critical exponents ν and β.
Description: © 2011 American Physical Society
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