Artículo
Effective field theory and integrability in two-dimensional Mott transition
Fecha de publicación:
08/2011
Editorial:
Academic Press Inc Elsevier Science
Revista:
Annals of Physics (New York)
ISSN:
0003-4916
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We study the Mott transition in a two-dimensional lattice spinless fermion model with nearest neighbors density-density interactions. By means of a two-dimensional Jordan-Wigner transformation, the model is mapped onto the lattice XXZ spin model, which is shown to possess a quantum group symmetry as a consequence of a recently found solution of the Zamolodchikov tetrahedron equation. A projection (from three to two space-time dimensions) property of the solution is used to identify the symmetry of the model at the Mott critical point as Uq(sl(2)-)⊗Uq(sl(2)-), with deformation parameter q= -1. Based on this result, the low-energy effective field theory for the model is obtained and shown to be a lattice double Chern-Simons theory with coupling constant k= 1 (with the standard normalization). By further employing the effective filed theory methods, we show that the Mott transition that arises is of topological nature, with vortices in an antiferromagnetic array and matter currents characterized by a d-density wave order parameter. We also analyze the behavior of the system upon weak coupling, and conclude that it undergoes a quantum gas-liquid transition which belongs to the Ising universality class.
Palabras clave:
CHERN-SIMONS
,
EFFECTIVE FIELD THEORIES
,
MOTT
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Articulos(SEDE CENTRAL)
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Citación
Bottesi, Federico L.; Zemba, Guillermo Raul; Effective field theory and integrability in two-dimensional Mott transition; Academic Press Inc Elsevier Science; Annals of Physics (New York); 326; 8; 8-2011; 1916-1940
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