Hidden non-Abelian gauge symmetries in doped planar antiferromagnets

Farakos, K; Mavromatos, NE

dc.contributor.author	Farakos, K	en
dc.contributor.author	Mavromatos, NE	en
dc.date.accessioned	2014-03-01T01:13:47Z
dc.date.available	2014-03-01T01:13:47Z
dc.date.issued	1998	en
dc.identifier.issn	0163-1829	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12724
dc.subject	Abelian Group	en
dc.subject	Degree of Freedom	en
dc.subject	Effective Action	en
dc.subject	Gauge Symmetry	en
dc.subject	Superconductors	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	CORRELATED ELECTRONIC SYSTEMS	en
dc.subject.other	HIGH-TC SUPERCONDUCTIVITY	en
dc.subject.other	2+1 DIMENSIONS	en
dc.subject.other	HUBBARD-MODEL	en
dc.subject.other	2-DIMENSIONAL SUPERCONDUCTIVITY	en
dc.subject.other	QUANTUM ANTIFERROMAGNET	en
dc.subject.other	FIELD-THEORY	en
dc.subject.other	BREAKING	en
dc.subject.other	FERMIONS	en
dc.subject.other	LATTICE	en
dc.title	Hidden non-Abelian gauge symmetries in doped planar antiferromagnets	en
heal.type	journalArticle	en
heal.identifier.primary	10.1103/PhysRevB.57.3017	en
heal.identifier.secondary	http://dx.doi.org/10.1103/PhysRevB.57.3017	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	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
heal.publisher	AMERICAN PHYSICAL SOC	en
heal.journalName	Physical Review B - Condensed Matter and Materials Physics	en
dc.identifier.doi	10.1103/PhysRevB.57.3017	en
dc.identifier.isi	ISI:000071835100057	en
dc.identifier.volume	57	en
dc.identifier.issue	5	en
dc.identifier.spage	3017	en
dc.identifier.epage	3030	en