Finite-Temperature Transition into a Power-Law Spin Phase with an Extensive Zero-Point Entropy

Details Finite-Temperature Transition into a Power-Law Spin Phase with an Extensive Zero-Point Entropy Finite-Temperature Transition into a Power-Law Spin Phase with an Extensive Zero-Point Entropy

1993-12-14

arxiv.org/abs/cond-mat/9312057v1

Physics

Condensed Matter

Scientific paper

10.1103/PhysRevB.49.12897

We introduce an $xy$ generalization of the frustrated Ising model on a triangular lattice. The presence of continuous degrees of freedom stabilizes a {\em finite-temperature} spin state with {\em power-law} discrete spin correlations and an extensive zero-point entropy. In this phase, the unquenched degrees of freedom can be described by a fluctuating surface with logarithmic height correlations. Finite-size Monte Carlo simulations have been used to characterize the exponents of the transition and the dynamics of the low-temperature phase.

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