6533b829fe1ef96bd128a40d
RESEARCH PRODUCT
Spin and charge orderings in the atomic limit of the U-V-J model
Gerardo SicaEvgeny PlekhanovFerdinando Mancinisubject
PhysicsHistoryHubbard modelStrongly Correlated Electrons (cond-mat.str-el)Condensed Matter - SuperconductivityParameterized complexityFOS: Physical sciencesComputer Science ApplicationsEducationk-nearest neighbors algorithmSuperconductivity (cond-mat.supr-con)symbols.namesakeCondensed Matter - Strongly Correlated ElectronssymbolsCondensed Matter::Strongly Correlated ElectronsHamiltonian (quantum mechanics)Mathematical physicsPhase diagramdescription
In this paper we study a generalization of the 1D Hubbard model by considering density-density and Ising-type spin-spin nearest neighbor (NN) interactions, parameterized by $V$ and $J$, respectively. We present the T=0 phase diagram for both ferro ($J>0$) and anti-ferro ($J<0$) coupling obtained in the narrow-band limit by means of an extension to zero-temperature of the transfer-matrix method. Based on the values of the Hamiltonian parameters, we identify a number of phases that involve orderings of the double occupancy, NN density and spin correlations, being these latter very fragile.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-10-24 |