Confinement-deconfinement transition as an indication of spin-liquid-type behavior in Na(2)IrO(3).

Confinement-Deconfinement Transition as an Indication of Spin-Liquid-Type Behavior

Quantum electrodynamics in 2 + 1 dimensions, confinement, and the stability of U(1) spin liquids.

Compact quantum electrodynamics in 2 + 1 dimensions often arises as an effective theory for a Mott insulator, with the Dirac fermions representing the low-energy spinons. An important and controversial issue in this context is whether a deconfinement transition takes place. We perform a renormalization group analysis to show that deconfinement occurs when N > Nc = 36/pi3 approximately to 1.161,...

2 00 3 The Deconfinement Phase Transition of Sp ( 2 ) and Sp ( 3 ) Yang - Mills Theories in 2 + 1 and 3 + 1 Dimensions

Some time ago, Svetitsky and Yaffe have argued that — if the de-confinement phase transition of a (d + 1)-dimensional Yang-Mills theory with gauge group G is second order — it should be in the universal-ity class of a d-dimensional spin model symmetric under the center of G. For d = 3 these arguments have been confirmed numerically only in the SU(2) case with center Z Z(2), simply because all S...

Confinement-deconfinement transition due to spontaneous symmetry breaking in quantum Hall bilayers

Band-inverted electron-hole bilayers support quantum spin Hall insulator and exciton condensate phases. Interest in quantum spin Hall effect in these systems has recently put them in the spotlight. We investigate such a bilayer in an external magnetic field. We show that the interlayer correlations lead to formation of a helical quantum Hall exciton condensate state. Existence of the counterpro...

Fluctuation Effects of Gauge Fields in the Slave-Boson t-J Model

We present a quantitative study of the charge-spin separation (CSS) phenomenon in a U(1) gauge theory of the t-J model of high-TC superconductors. We calculate the critical temperature TCSS of a confinement-deconfinement phase transition as a function of the hole doping δ, below which the CSS takes place. The fluctuations of gauge field are so large that TCSS is reduced to about 10 % of its mea...