Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1999-03-18
Physics
Condensed Matter
Strongly Correlated Electrons
Modified dicussion of the hard-core model, correcting several mistakes
Scientific paper
10.1103/PhysRevB.61.6307
As discovered in the quantum Hall effect, a very effective way for strongly-repulsive electrons to minimize their potential energy is to aquire non-zero relative angular momentum. We pursue this mechanism for interacting two-dimensional electrons in zero magnetic field, by employing a representation of the electrons as composite bosons interacting with a Chern-Simons gauge field. This enables us to construct a dual description in which the fundamental constituents are vortices in the auxiliary boson fields. The resulting formalism embraces a cornucopia of possible phases. Remarkably, superconductivity is a generic feature, while the Fermi liquid is not -- prompting us to conjecture that such a state may not be possible when the interactions are sufficiently strong. Many aspects of our earlier discussions of the nodal liquid and spin-charge separation find surprising incarnations in this new framework.
Balents Leon
Fisher Matthew P. A.
Nayak Chetan
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