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Domain Wall Renormalization Group Study of XY Model with Quenched Random Phase Shifts

The XY model with quenched random disorder is studied by a zero temperature domain wall renormalization group method in 2D and 3D. Instead of the usual phase representation we use the charge (vortex) representation to compute the domain wall, or defe

Externí odkaz: http://arxiv.org/abs/cond-mat/0203299

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Molecular Dynamics Study of the Nematic-Isotropic Interface

Autor: Akino, N., Schmid, F., Allen, M. P.

We present large-scale molecular dynamics simulations of a nematic-isotropic interface in a system of repulsive ellipsoidal molecules, focusing in particular on the capillary wave fluctuations of the interfacial position. The interface anchors the ne

Externí odkaz: http://arxiv.org/abs/cond-mat/0101169

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Numerical Study of Order in a Gauge Glass Model

Autor: Kosterlitz, J. M., Akino, N.

The XY model with quenched random phase shifts is studied by a T=0 finite size defect energy scaling method in 2d and 3d. The defect energy is defined by a change in the boundary conditions from those compatible with the true ground state configurati

Externí odkaz: http://arxiv.org/abs/cond-mat/9806346

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Numerical Study of Spin and Chiral Order in a Two-Dimensional XY Spin Glass

Autor: Kosterlitz, J. M., Akino, N.

The two dimensional XY spin glass is studied numerically by a finite size scaling method at T=0 in the vortex representation which allows us to compute the exact (in principle) spin and chiral domain wall energies. We confirm earlier predictions that

Externí odkaz: http://arxiv.org/abs/cond-mat/9806339

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