title: Zero-temperature criticality in the two-dimensional gauge glass model.
abstract: The zero-temperature critical state of the two-dimensional gauge glass model is investigated. It is found that low-energy vortex configurations afford a simple description in terms of gapless, weakly interacting vortex-antivortex pair excitations. A linear dielectric screening calculation is presented in a renormalization group setting that yields a power law decay of spin-wave stiffness with distance. These properties are in agreement with low-temperature specific heat and spin-glass susceptibility data obtained in large-scale multicanonical Monte Carlo simulations.
authors.affiliation: Department of Physics, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR, China. lhtang@hkbu.edu.hk
authors.forename: Lei-Han
authors.initials: LH
authors.lastname: Tang
authors.forename: Peiqing
authors.initials: P
authors.lastname: Tong