Work

Thermal transport in one-dimensional spin heterostructures

Year: 2009

Type: article

Abstract: 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.

Source: Physical Review B

DOI: 10.1103/physrevb.80.014425

Authors: Liliana Arrachea, Gustavo S. Lozano, A. A. Aligia

Institutions: Universidad de Buenos Aires, Balseiro Institute, Bariloche Atomic Centre, Comisión Nacional de Energía Atómica

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funder: Consejo Nacional de Investigaciones Científicas y Técnicas

Award: G4359570771