Incommensurate spin-density-wave and metal-insulator transition in the one-dimensional periodic Anderson model

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorBertussi, P. R.
dc.creatorSilva Neto, M. B.
dc.creatorRappoport, T. G.
dc.creatorMalvezzi, André Luiz
dc.creatordos Santos, R. R.
dc.date2014-05-20T13:26:26Z
dc.date2014-05-20T13:26:26Z
dc.date2011-08-15
dc.date.accessioned2017-04-05T20:05:36Z
dc.date.available2017-04-05T20:05:36Z
dc.identifierPhysical Review B. College Pk: Amer Physical Soc, v. 84, n. 7, p. 9, 2011.
dc.identifier1098-0121
dc.identifierhttp://hdl.handle.net/11449/8521
dc.identifier10.1103/PhysRevB.84.075156
dc.identifierWOS:000293830800007
dc.identifierWOS000293830800007.pdf
dc.identifierhttp://dx.doi.org/10.1103/PhysRevB.84.075156
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/856876
dc.descriptionWe have used the density-matrix renormalization group method to study the ground-state properties of the symmetric periodic Anderson model in one dimension. We have considered lattices with up to N-s = 50 sites, and electron densities ranging from quarter to half filling. Through the calculation of energies, correlation functions, and their structure factors, together with careful extrapolations (toward N-s -> infinity), we were able to map out a phase diagram U vs n, where U is the electronic repulsion on f orbitals, and n is the electronic density, for a fixed value of the hybridization. At quarter filling, n = 1, our data is consistent with a transition at U-c1 similar or equal to 2, between a paramagnetic (PM) metal and a spin-density-wave (SDW) insulator; overall, the region U less than or similar to 2 corresponds to a PM metal for all n < 2. For 1 < n less than or similar to 1.5 a ferromagnetic phase is present within a range of U, while for 1.5 less than or similar to n < 2, we find an incommensurate SDW phase; above a certain U-c(n), the system displays a Ruderman-Kittel-Kasuya-Yosida behavior, in which the magnetic wave vector is determined by the occupation of the conduction band. At half filling, the system is an insulating spin liquid, but with a crossover between weak and strong magnetic correlations.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageeng
dc.publisherAmer Physical Soc
dc.relationPhysical Review B
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.titleIncommensurate spin-density-wave and metal-insulator transition in the one-dimensional periodic Anderson model
dc.typeOtro


Este ítem pertenece a la siguiente institución