Jump to main content
Jump to site search

Issue 45, 2017, Issue in Progress
Previous Article Next Article

Thermal spin current in zigzag silicene nanoribbons with sp2–sp3 edges

Author affiliations

Abstract

Using first-principles calculations combined with non-equilibrium Green's function method, we study thermal spin transport of zigzag silicene nanoribbons (ZSiNRs) with unsymmetrical sp2–sp3 edges under a temperature gradient but no bias. Both in the linear and non-linear response regimes, we have opposite flow directions for different spins, which leads unambiguously to spin current. Most important is that pure spin current can be achieved and basically no tuning of the chemical potential μ is needed since the neutral point is very close to μ = 0 (the chemical potential located at the Fermi level) and this fact holds for a very large temperature range studied (110 ≤ TL ≤ 300 K). The direction of charge current induced by a temperature gradient can be easily reversed by tuning the chemical potential, while the spin current is almost unchanged in the same process, indicating that the spin current is robust and stable. In addition, both spin current and charge current present a thermoelectric diode behavior for TL ≤ 200 K in the nonlinear response regime. These findings suggest that the unsymmetrically sp2–sp3 terminated ZSiNRs are promising materials for spin caloritronic devices.

Graphical abstract: Thermal spin current in zigzag silicene nanoribbons with sp2–sp3 edges

Back to tab navigation

Publication details

The article was received on 20 Apr 2017, accepted on 20 May 2017 and first published on 26 May 2017


Article type: Paper
DOI: 10.1039/C7RA04477A
Citation: RSC Adv., 2017,7, 28124-28129
  • Open access: Creative Commons BY-NC license
  •   Request permissions

    Thermal spin current in zigzag silicene nanoribbons with sp2–sp3 edges

    P. Jiang, X. Tao, H. Hao, L. Song, X. Zheng and Z. Zeng, RSC Adv., 2017, 7, 28124
    DOI: 10.1039/C7RA04477A

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements