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dc.contributor.author
Aita, Hugo Alberto
dc.contributor.author
Arrachea, Liliana del Carmen
dc.contributor.author
Naon, Carlos Maria
dc.contributor.author
Fradkin, Eduardo
dc.date.available
2015-07-21T15:02:59Z
dc.date.issued
2013-08
dc.identifier.citation
Aita, Hugo Alberto; Arrachea, Liliana del Carmen; Naon, Carlos Maria; Fradkin, Eduardo; Heat transport through quantum Hall edge states: Tunneling versus capacitive coupling to reservoirs; Amer Physical Soc; Physical Review B; 88; 8-2013; 85122-85122
dc.identifier.issn
1098-0121
dc.identifier.uri
http://hdl.handle.net/11336/1322
dc.description.abstract
We study the heat transport along an edge state of a two-dimensional electron gas in the quantum Hall regime, in contact to two reservoirs at different temperatures. We consider two exactly solvable models for the edge state coupled to the reservoirs. The first one corresponds to filling ν=1 and tunneling coupling to the reservoirs. The second one corresponds to integer or fractional filling of the sequence ν=1/m (with m odd), and capacitive coupling to the reservoirs. In both cases, we solve the problem by means of nonequilibrium Green function formalism. We show that heat propagates chirally along the edge in the two setups. We identify two temperature regimes, defined by Δ, the mean level spacing of the edge. At low temperatures, T<Δ, finite size effects play an important role in heat transport, for both types of contacts. The nature of the contacts manifests itself in different power laws for the thermal conductance as a function of the temperature. For capacitive couplings, a highly nonuniversal behavior takes place, through a prefactor that depends on the length of the edge as well as on the coupling strengths and the filling fraction. For larger temperatures, T>Δ, finite-size effects become irrelevant, but the heat transport strongly depends on the strength of the edge-reservoir interactions, in both cases. The thermal conductance for tunneling coupling grows linearly with T, whereas for the capacitive case, it saturates to a value that depends on the coupling strengths and the filling factors of the edge and the contacts.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Amer Physical Soc
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Quantum
dc.subject
Transport
dc.subject
Hall
dc.subject
Fields
dc.subject.classification
Física de los Materiales Condensados
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Heat transport through quantum Hall edge states: Tunneling versus capacitive coupling to reservoirs
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-03-30 10:35:44.97925-03
dc.journal.volume
88
dc.journal.pagination
85122-85122
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Aita, Hugo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET - La Plata. Instituto de Fisica La Plata; Argentina;
dc.description.fil
Fil: Arrachea, Liliana del Carmen. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires; Argentina;
dc.description.fil
Fil: Naon, Carlos Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET - La Plata. Instituto de Fisica La Plata; Argentina;
dc.description.fil
Fil: Fradkin, Eduardo. University of Illinois at Urbana-Champaign. Department of Physics and Institute for Condensed Matter Theory; Estados Unidos de América;
dc.journal.title
Physical Review B
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1305.5833v2
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevB.88.085122
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