Condensed Matter Theory

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Paired composite fermion phase of quantum Hall bilayers at \nu = 1/2 + 1/2

(2008)

Authors:

Gunnar Moller, Steven H Simon, Edward H Rezayi
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Theory of Activated Transport in Bilayer Quantum Hall Systems

(2008)

Authors:

Bahman Roostaei, Kieran J Mullen, Herbert A Fertig, Steven H Simon
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Topological order from quantum loops and nets

(2008)
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Charge frustration and quantum criticality for strongly correlated fermions

(2008)

Authors:

Liza Huijse, James Halverson, Paul Fendley, Kareljan Schoutens
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Classical-Quantum Mappings for Geometrically Frustrated Systems: Spin Ice in a [100] Field

ArXiv 0803.4204 (2008)

Authors:

Stephen Powell, JT Chalker

Abstract:

Certain classical statistical systems with strong local constraints are known to exhibit Coulomb phases, where long-range correlation functions have power-law forms. Continuous transitions from these into ordered phases cannot be described by a naive application of the Landau-Ginzburg-Wilson theory, since neither phase is thermally disordered. We present an alternative approach to a critical theory for such systems, based on a mapping to a quantum problem in one fewer spatial dimensions. We apply this method to spin ice, a magnetic material with geometrical frustration, which exhibits a Coulomb phase and a continuous transition to an ordered state in the presence of a magnetic field applied in the [100] direction.
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