Work

Stiffness from Disorder in Triangular-Lattice Ising Thin Films

Year: 2014

Type: article

Abstract: We study the triangular lattice Ising model with a finite number of vertically stacked layers and demonstrate a low temperature reentrance of two Berezinskii-Kosterlitz-Thouless transitions, which results in an extended disordered regime down to T=0. Numerical results are complemented with the derivation of an effective low-temperature dimer theory. Contrary to order by disorder, we present a new scenario for fluctuation-induced ordering in frustrated spin systems. While short-range spin-spin correlations are enhanced by fluctuations, quasi-long-range ordering is precluded at low enough temperatures by proliferation of topological defects.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.112.155702

Authors: Shi-Zeng Lin, Yoshitomo Kamiya, Gia-Wei Chern, Cristian D. Batista

Institutions: Los Alamos National Laboratory, RIKEN

Language: English

Topic: Theoretical and Computational Physics

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: U.S. Department of Energy

Award: G286898171