FIELD-INDUCED KOSTERLITZ-THOULESS TRANSITION IN THE ZERO-TEMPERATURE TRIANGULAR ISING ANTIFERROMAGNET

[摘要] We investigate the zero-temperature triangular Ising antiferromagnet in a magnetic field by means of transfer matrix and Monte Carlo methods. The finite-size results are compared with predictions obtained from a mapping to the Gaussian model. The results confirm the presence of a field-induced Kosterlitz-Thouless transition to a state with long-range order.

[关键词] MODEL