Gauge invariance and spinon-dopon confinement in the t-J model: implications for Fermi surface reconstruction in the cuprates

Ferraz Filho, Álvaro; Kochetov, Evgeny

Gauge invariance and spinon-dopon confinement in the t-J model: implications for Fermi surface reconstruction in the cuprates

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dc.contributor.author	Ferraz Filho, Álvaro
dc.contributor.author	Kochetov, Evgeny
dc.date.accessioned	2020-05-13T19:46:40Z
dc.date.available	2020-05-13T19:46:40Z
dc.date.issued	2013-12-18
dc.description.resumo	We discuss the application of the two-band spin-dopon representation of the t-J model to address the issue of the Fermi surface reconstruction observed in the cuprates. We show that the electron no double occupancy (NDO) constraint plays a key role in this formulation. In particular, the auxiliary lattice spin and itinerant dopon degrees of freedom of the spin-dopon formulation of the t-J model are shown to be confined in the emergent U(1) gauge theory generated by the NDO constraint. This constraint is enforced by the requirement of an infinitely large spin-dopon coupling. As a result, the t-J model is equivalent to a Kondo-Heisenberg lattice model of itinerant dopons and localized lattice spins at infinite Kondo coupling at all dopings. We show that mean-field treatment of the large vs. small Fermi surface crossing in the cuprates which leaves out the NDO constraint, leads to inconsistencies and it is automatically excluded form the t-J model framework.	pt_BR
dc.identifier.citation	FERRAZ FILHO, Alvaro; KOCHETOV, E. Gauge invariance and spinon-dopon confinement in the t-J model: implications for Fermi surface reconstruction in the cuprates. Eur. Phys. J. B. v. 86, n. 512, 2013. ISSN 1434-6036 versão online. DOI https://doi.org/10.1140/epjb/e2013-40849-8. Disponível em: https://link.springer.com/article/10.1140/epjb/e2013-40849-8. Acesso em: 13 maio 2020.	pt_BR
dc.identifier.doi	10.1140/epjb/e2013-40849-8
dc.identifier.issn	1434-6028 (print), 1434-6036 (online)
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/28974
dc.language	en	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	Solid State and Materials	pt_BR
dc.title	Gauge invariance and spinon-dopon confinement in the t-J model: implications for Fermi surface reconstruction in the cuprates	pt_BR
dc.type	article	pt_BR