Work

Vector Chiral Phases in the Frustrated 2D X Y Model and Quantum Spin Chains

Year: 2014

Type: article

Abstract: The phase diagram of the frustrated 2D classical and 1D quantum XY models is calculated analytically. Four transitions are found: the vortex unbinding transitions triggered by strong fluctuations occur above and below the chiral transition temperature. Vortex interaction is short range on small and logarithmic on large scales. The chiral transition, though belonging to the Ising universality class by symmetry, has different critical exponents due to nonlocal interaction. In a narrow region close to the Lifshitz point a reentrant phase transition between paramagnetic and quasiferromagnetic phase appears. Applications to antiferromagnetic quantum spin chains and multiferroics are discussed.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.112.157201

Authors: H. Schenck, V. L. Pokrovsky, T. Nattermann

Institutions: University of Cologne, Landau Institute for Theoretical Physics, Texas A&M University

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: THEORY OF MAGNETIC HETEROSTRUCTURES ON THE NANOMETER SCALE