U(1). The resulting Abelian effective theory is closely related to an earlier model proposed as the continuum limit of large-spin planar doped antiferromagnets, which lead to an unconventional scenario for two-dimensional parity-invariant superconductivity.. Types: journalArticle. Subjects: BREAKING, HIGH-TC SUPERCONDUCTIVITY, Gauge Symmetry, FIELD-THEORY, FERMIONS, Physics, Condensed Matter, Abelian Group, HUBBARD-MODEL, Effective Action, Superconductors, Degree of Freedom, 2+1 DIMENSIONS, QUANTUM ANTIFERROMAGNET, CORRELATED ELECTRONIC SYSTEMS, 2-DIMENSIONAL SUPERCONDUCTIVITY, LATTICE" />

Hidden non-Abelian gauge symmetries in doped planar antiferromagnets

 
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1998 (EL)

Hidden non-Abelian gauge symmetries in doped planar antiferromagnets (EN)

Mavromatos, NE (EN)
Farakos, K (EN)

We investigate the possibility of hidden non-Abelian local phase symmetries in large-U doped planar Hubbard antiferromagnets, believed to simulate the physics of two-dimensional (magnetic) superconductors. We present a spin-charge separation ansatz, appropriate to incorporate holon spin flip, which allows for such a hidden local gauge symmetry to emerge in the effective action. The group is of the form SU(2)xU(S)(1)xU(em)(1), where SU(2) is a local non-Abelian group associated with the spin degrees of freedom, U-em(1) is that of ordinary electromagnetism, associated with the electric charge of the holes, and U-S(1) is a "statistical" Abelian gauge group pertaining to the fractional statistics of holes on the spatial plane. In certain regime of the parameters of the model, namely, strong U-S(1) and weak SU(2), there is the possibility of dynamical formation of a holon condensate. This leads to a dynamical breaking of SU(2)-->U(1). The resulting Abelian effective theory is closely related to an earlier model proposed as the continuum limit of large-spin planar doped antiferromagnets, which lead to an unconventional scenario for two-dimensional parity-invariant superconductivity. (EN)

journalArticle (EN)

BREAKING (EN)
HIGH-TC SUPERCONDUCTIVITY (EN)
Gauge Symmetry (EN)
FIELD-THEORY (EN)
FERMIONS (EN)
Physics, Condensed Matter (EN)
Abelian Group (EN)
HUBBARD-MODEL (EN)
Effective Action (EN)
Superconductors (EN)
Degree of Freedom (EN)
2+1 DIMENSIONS (EN)
QUANTUM ANTIFERROMAGNET (EN)
CORRELATED ELECTRONIC SYSTEMS (EN)
2-DIMENSIONAL SUPERCONDUCTIVITY (EN)
LATTICE (EN)


Physical Review B - Condensed Matter and Materials Physics (EN)

Αγγλική γλώσσα

1998 (EN)

57 (EN)
3017 (EN)
5 (EN)
ISI:000071835100057 (EN)
10.1103/PhysRevB.57.3017 (EN)
0163-1829 (EN)
3030 (EN)

AMERICAN PHYSICAL SOC (EN)




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