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Abstract:

We consider a model for an edge state of electronic systems in the quantum Hall regime with filling ν=1 and in the quantum spin Hall regime. In both cases, the system is in contact with two reservoirs by tunneling at point contacts. Both systems are locally driven by applying an ac voltage in one of the contacts. By weakly coupling them to a third reservoir, the transport of the generated heat is studied in two different ways: (i) when the third reservoir acts as a thermometer, the local temperature is sensed and (ii) when the third reservoir acts as a voltage probe, the time-dependent local voltage is sensed. Our results indicate a chiral propagation of the heat along the edge in the quantum Hall and in the quantum spin Hall cases (if the injected electrons are spin polarized). We also show that a analogous picture is obtained if instead of heating by ac driving the system is put in contact to a stationary reservoir at a higher temperature. In both cases, the temperature profile shows that the electrons along the edge thermalize with the closest "upstream" reservoir. © 2011 American Physical Society.

Registro:

Documento: Artículo
Título:Chiral heat transport in driven quantum Hall and quantum spin Hall edge states
Autor:Arrachea, L.; Fradkin, E.
Filiación:Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón 1, 1428, Buenos Aires, Argentina
Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, IL 61801-3080, United States
Año:2011
Volumen:84
Número:23
DOI: http://dx.doi.org/10.1103/PhysRevB.84.235436
Título revista:Physical Review B - Condensed Matter and Materials Physics
Título revista abreviado:Phys. Rev. B Condens. Matter Mater. Phys.
ISSN:10980121
CODEN:PRBMD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v84_n23_p_Arrachea

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Citas:

---------- APA ----------
Arrachea, L. & Fradkin, E. (2011) . Chiral heat transport in driven quantum Hall and quantum spin Hall edge states. Physical Review B - Condensed Matter and Materials Physics, 84(23).
http://dx.doi.org/10.1103/PhysRevB.84.235436
---------- CHICAGO ----------
Arrachea, L., Fradkin, E. "Chiral heat transport in driven quantum Hall and quantum spin Hall edge states" . Physical Review B - Condensed Matter and Materials Physics 84, no. 23 (2011).
http://dx.doi.org/10.1103/PhysRevB.84.235436
---------- MLA ----------
Arrachea, L., Fradkin, E. "Chiral heat transport in driven quantum Hall and quantum spin Hall edge states" . Physical Review B - Condensed Matter and Materials Physics, vol. 84, no. 23, 2011.
http://dx.doi.org/10.1103/PhysRevB.84.235436
---------- VANCOUVER ----------
Arrachea, L., Fradkin, E. Chiral heat transport in driven quantum Hall and quantum spin Hall edge states. Phys. Rev. B Condens. Matter Mater. Phys. 2011;84(23).
http://dx.doi.org/10.1103/PhysRevB.84.235436