Perfect diode in quantum spin chains

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dc.creatorVinitha Balachandran
dc.creatorGiuliano Benenti
dc.creatorEmmanuel Araújo Pereira
dc.creatorGiulio Casati
dc.creatorDario Poletti
dc.date.accessioned2023-09-11T12:05:45Z
dc.date.accessioned2025-09-08T23:33:24Z
dc.date.available2023-09-11T12:05:45Z
dc.date.issued2018
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.identifier.doihttps://doi.org/10.1103/PhysRevLett.120.200603
dc.identifier.issn1079-7114
dc.identifier.urihttps://hdl.handle.net/1843/58543
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofPhysical Review Letters
dc.rightsAcesso Restrito
dc.subjectCadeia de spins
dc.subjectSistemas quânticos
dc.subjectQuantum transport
dc.subject.otherMagnons
dc.subject.otherNonequilibrium statistical mechanics
dc.subject.otherOpen quantum systems
dc.subject.otherQuantum transport
dc.subject.otherSpin current
dc.titlePerfect diode in quantum spin chains
dc.typeArtigo de periódico
local.citation.epage200603-5
local.citation.issue20
local.citation.spage200603-1
local.citation.volume120
local.description.resumoWe study the rectification of the spin current in XXZ chains segmented in two parts, each with a different anisotropy parameter. Using exact diagonalization and a matrix product state algorithm, we find that a large rectification (of the order of 10 4) is attainable even using a short chain of N ¼ 8 spins, when one-half of the chain is gapless while the other has a large enough anisotropy. We present evidence of diffusive transport when the current is driven in one direction and of a transition to an insulating behavior of the system when driven in the opposite direction, leading to a perfect diode in the thermodynamic limit. The above results are explained in terms of matching of the spectrum of magnon excitations between the two halves of the chain.
local.identifier.orcidhttps://orcid.org/0000-0002-0510-0524
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://journals.aps.org/prl/abstract/10.1103/PhysRevLett.120.200603

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