Double-layer quantum Hall antiferromagnetism at filling fraction nu=2/(odd integer)

Details Double-layer quantum Hall antiferromagnetism at filling fraction nu=2/(odd integer) Double-layer quantum Hall antiferromagnetism at filling fraction nu=2/(odd integer)

1997-01-21

arxiv.org/abs/cond-mat/9701142v1

Phys. Rev. Lett. 79, 917 (1997)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

RevTeX, 4 pages (two columns), figures included

Scientific paper

10.1103/PhysRevLett.79.917

A low energy action for double-layer quantum Hall systems at filling fractions $\nu = 2/m$ ($m$ an odd integer) is introduced. Interlayer antiferromagnetic exchange induces a phase with canted spin order, and also a spin-singlet phase. Universal properties of zero and finite temperature transitions are obtained. We compute the critical temperature at which the canted order vanishes in a Kosterlitz-Thouless transition. Implications for recent light scattering experiments at $\nu = 2$ are noted.

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