Thermal transport in one-dimensional spin heterostructures

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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Detalles Bibliográficos
Publicado: 2009
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v80_n1_p_Arrachea
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 paper:paper_10980121_v80_n1_p_Arrachea
record_format dspace
spelling paper:paper_10980121_v80_n1_p_Arrachea2023-06-08T16:07:44Z Thermal transport in one-dimensional spin heterostructures 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. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v80_n1_p_Arrachea 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.
title Thermal transport in one-dimensional spin heterostructures
spellingShingle 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
publishDate 2009
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v80_n1_p_Arrachea
http://hdl.handle.net/20.500.12110/paper_10980121_v80_n1_p_Arrachea
_version_ 1768545341752213504

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