Thermal transport in one-dimensional spin heterostructures

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We study heat transport in a one-dimensional inhomogeneous quantum spin-1/2 system. It consists of a finite-size XX spin chain coupled at its ends to semi-infinite XX and XY chains at different temperatures, which play the role of heat and spin reservoirs. After using the Jordan-Wigner transformatio...

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Autores principales: Arrachea, L., Lozano, G.S., Aligia, A.A.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_10980121_v80_n1_p_Arrachea
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_10980121_v80_n1_p_Arrachea
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spelling todo:paper_10980121_v80_n1_p_Arrachea2023-10-03T16:06:13Z Thermal transport in one-dimensional spin heterostructures Arrachea, L. Lozano, G.S. Aligia, A.A. We study heat transport in a one-dimensional inhomogeneous quantum spin-1/2 system. It consists of a finite-size XX spin chain coupled at its ends to semi-infinite XX and XY chains at different temperatures, which play the role of heat and spin reservoirs. After using the Jordan-Wigner transformation we map the original spin Hamiltonian into a fermionic Hamiltonian, which contains normal and pairing terms. We find the expressions for the heat currents and solve the problem with a nonequilibrium Green's-function formalism. We analyze the behavior of the heat currents as functions of the model parameters. When finite magnetic fields are applied at the two reservoirs, the system exhibits rectifying effects in the heat flow. © 2009 The American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10980121_v80_n1_p_Arrachea
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We study heat transport in a one-dimensional inhomogeneous quantum spin-1/2 system. It consists of a finite-size XX spin chain coupled at its ends to semi-infinite XX and XY chains at different temperatures, which play the role of heat and spin reservoirs. After using the Jordan-Wigner transformation we map the original spin Hamiltonian into a fermionic Hamiltonian, which contains normal and pairing terms. We find the expressions for the heat currents and solve the problem with a nonequilibrium Green's-function formalism. We analyze the behavior of the heat currents as functions of the model parameters. When finite magnetic fields are applied at the two reservoirs, the system exhibits rectifying effects in the heat flow. © 2009 The American Physical Society.
format JOUR
author Arrachea, L.
Lozano, G.S.
Aligia, A.A.
spellingShingle Arrachea, L.
Lozano, G.S.
Aligia, A.A.
Thermal transport in one-dimensional spin heterostructures
author_facet Arrachea, L.
Lozano, G.S.
Aligia, A.A.
author_sort Arrachea, L.
title Thermal transport in one-dimensional spin heterostructures
title_short Thermal transport in one-dimensional spin heterostructures
title_full Thermal transport in one-dimensional spin heterostructures
title_fullStr Thermal transport in one-dimensional spin heterostructures
title_full_unstemmed Thermal transport in one-dimensional spin heterostructures
title_sort thermal transport in one-dimensional spin heterostructures
url http://hdl.handle.net/20.500.12110/paper_10980121_v80_n1_p_Arrachea
work_keys_str_mv AT arracheal thermaltransportinonedimensionalspinheterostructures
AT lozanogs thermaltransportinonedimensionalspinheterostructures
AT aligiaaa thermaltransportinonedimensionalspinheterostructures
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