Nonequilibrium Kinetics of the Triangular Antiferromagnetic Ising model

Condensed Matter lunchtime seminar

Nonequilibrium Kinetics of the Triangular Antiferromagnetic Ising model

  • Event time: 1:00pm
  • Event date: 5th February 2007
  • Speaker: Grace Kim (University of Edinburgh)
  • Location: Room 2511,

Event details

The triangular antiferromagnetic Ising(TAFI) model on a triangular lattice is a prime example of a periodically frustrated Ising model. TAFI has remarkable equilibrium properties originating from frustration caused by the geometry of the underlying lattice and has an exponential number of ground state degeneracies, leading to nonzero entropy per spin at zero temperature.

This macroscopic ground-state degeneracy crucially affects the nonequilibrium evolution process followed by a quench to zero (critical) temperature. During the last few years, I and co-authors have studied the nonequilibrium dynamics of TAFI via a dynamic Monte Carlo simulation method employing spin-flip kinetics. Today I will talk about our works - nonequilibrium kinetics of TAFI.

[1] 'Nonequilibrium critical dynamics of the triangular antiferromagnetic Ising model', E.Kim, B.Kim, and S.J.Lee, Phys. Rev. E 68, 0166127 (2003).

[2] 'Nonequilibrium relaxation within the ground-state manifold in the antiferromagnetic Ising model on a triangular lattice', E.Kim, S.J.Lee, and B.Kim, Phys. Rev. E 75, Accepted (Feb. 2007).

This is a weekly series of informal talks given primarily by members of the soft condensed matter and statistical mechanics groups, but is also open to members of other groups and external visitors. The aim of the series is to promote discussion and learning of various topics at a level suitable to the broad background of the group. Everyone is welcome to attend..

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