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Thermal transport through a one-dimensional quantum spin-1/2 chain heterostructure: The role of three-site spin interaction

Author

Listed:
  • H. Wu
  • Y. Wang
  • W. Gong
  • Y. Han
  • X. Chen

Abstract

We study the thermal transport through a quantum spin-1/2 chain heterostructure, which consists of a finite-size chain with two-site isotropic XY interaction and three-site XZX+YZY interaction coupled at its ends to two semi-infinite isotropic XY chains. After performing Jordan-Wigner transformation, we map the original spin Hamiltonian into a fermion Hamiltonian and express the heat current with a nonequilibrium Green’s function formalism. Then, the heat current as functions of the structure parameters are studied in detail. As a result, we observe that a finite magnetic field applied at the finite-size chain can efficiently induce the heat current asymmetry with ΔΩ (ΔΩ is the magnetic field difference between the finite-size chain and the semi-infinite chains). Accordingly, such a magnetic field can be viewed as a switch in manipulating the heat current. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Suggested Citation

  • H. Wu & Y. Wang & W. Gong & Y. Han & X. Chen, 2013. "Thermal transport through a one-dimensional quantum spin-1/2 chain heterostructure: The role of three-site spin interaction," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 86(1), pages 1-7, January.
    • Handle: RePEc:spr:eurphb:v:86:y:2013:i:1:p:1-7:10.1140/epjb/e2012-30793-6
    DOI: 10.1140/epjb/e2012-30793-6
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    Mesoscopic and Nanoscale Systems;

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