Energy current manipulation and reversal of rectification in graded spin chains

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dc.creatorAlberto Luiz de Paula Júnior
dc.creatorEmmanuel Araújo Pereira
dc.creatorRaphael Campos Drumond
dc.creatorMaria Carolina de Oliveira Aguiar
dc.date.accessioned2023-09-11T12:27:38Z
dc.date.accessioned2025-09-09T00:35:47Z
dc.date.available2023-09-11T12:27:38Z
dc.date.issued2020
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipINCT – Instituto nacional de ciência e tecnologia (Antigo Instituto do Milênio)
dc.identifier.doihttps://doi.org/10.1088/1361-648X/ab6b8c
dc.identifier.issn1361-648X
dc.identifier.urihttps://hdl.handle.net/1843/58545
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Physics: Condensed Matter
dc.rightsAcesso Restrito
dc.subjectCadeia de spins
dc.subjectRetificação
dc.subjectEnergia
dc.subject.otherSpin chain
dc.subject.otherNon-equilibrium dynamics
dc.subject.otherRectification
dc.subject.otherSpin current
dc.subject.otherEnergy current
dc.titleEnergy current manipulation and reversal of rectification in graded spin chains
dc.typeArtigo de periódico
local.citation.epage10
local.citation.issue17
local.citation.spage1
local.citation.volume32
local.description.resumoThis work is devoted to the investigation of nontrivial transport properties in many-body quantum systems. Precisely, we study transport in the steady state of spin-1/2 Heisenberg XXZ chains, driven out of equilibrium by two magnetic baths at their end points. We take graded versions of the model, i.e. asymmetric chains in which some structure gradually changes in space. We investigate how we can manipulate and control the energy and spin currents of such chains by tuning external and/or inner parameters. In particular, we describe the occurrence of energy current rectification and its reversal due to the application of external magnetic fields. We show that, after carefully chosen inner parameters for the system, by turning on an external magnetic field we can find spin and energy currents propagating in different directions. More interestingly, we may find cases in which rectifications of energy and spin currents occur in opposite directions, i.e. if the energy current is larger when flowing from left to right side, then the spin current is larger if it flows from right to left side. We still describe situations with inversion of the energy current direction as we increase the system asymmetry. We stress that our work aims the development of theoretical knowledge as well as the stimulation of future experimental applications.
local.identifier.orcidhttps://orcid.org/0000-0002-0213-6070
local.identifier.orcidhttps://orcid.org/0000-0003-3263-0202
local.identifier.orcidhttps://orcid.org/0000-0002-9219-8901
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.departmentICX - DEPARTAMENTO DE MATEMÁTICA
local.publisher.initialsUFMG
local.url.externahttps://iopscience.iop.org/article/10.1088/1361-648X/ab6b8c

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