Publication: Numerical study of critical properties and hidden orders in dimerized spin ladders
All || By Area || By Year| Title | Numerical study of critical properties and hidden orders in dimerized spin ladders | Authors/Editors* | Sandra J. Gibson, R. Meyer, and Gennady Y. Chitov |
|---|---|
| Where published* | Phys. Rev. B |
| How published* | Journal |
| Year* | 2011 |
| Volume | 83 |
| Number | 10 |
| Pages | 104423 |
| Publisher | American Physical Society |
| Keywords | |
| Link | http://link.aps.org/doi/10.1103/PhysRevB.83.104423 |
| 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. |
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