Quantum disordered phase on the frustrated honeycomb lattice

dc.creatorCabra, Daniel Carlos
dc.creatorLamas, Carlos Alberto
dc.creatorRosales, Héctor Diego
dc.date2011-03-07
dc.date2021-10-05T15:17:38Z
dc.date.accessioned2023-07-15T03:30:30Z
dc.date.available2023-07-15T03:30:30Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/126230
dc.identifierissn:1098-0121
dc.identifierissn:1550-235X
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7465977
dc.descriptionIn the present paper we study the phase diagram of the Heisenberg model on the honeycomb lattice with antiferromagnetic interactions up to third neighbors along the line J₂=J₃ that includes the point J₂=J₃=J₁/2, corresponding to the highly frustrated point where the classical ground state has macroscopic degeneracy. Using the linear spin-wave theory and the Schwinger boson technique followed by a mean field decoupling and exact diagonalization for small systems, we find an intermediate phase with a spin gap and short-range Néel correlations in the strong quantum limit S=½. All techniques provide consistent results which allow us to predict the existence of a quantum disordered phase, which may have been observed in recent high-field ESR measurements in manganites.
dc.descriptionInstituto de Física La Plata
dc.formatapplication/pdf
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectFísica
dc.subjectPhysics
dc.subjectLattice (order)
dc.subjectAntiferromagnetism
dc.subjectQuantum limit
dc.subjectHeisenberg model
dc.subjectMean field theory
dc.subjectCondensed matter physics
dc.subjectQuantum mechanics
dc.subjectGround state
dc.subjectBoson
dc.subjectPhase diagram
dc.titleQuantum disordered phase on the frustrated honeycomb lattice
dc.typeArticulo
dc.typeArticulo


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