Thermoelectric effects in silicene nanoribbons
Krzysztof Zberecki , Michał Wierzbicki , J. Barnaś , Renata Świrkowicz
AbstractTransport and thermoelectric coefficients (including also spin thermopower) of silicene nanoribbons with zigzag edges are investigated by ab initio numerical methods. Local spin density of such nanoribbons reveals edge magnetism. As in graphene, one finds antiferromagnetic and ferromagnetic ordering, with spin polarization at one edge antiparallel or parallel to that at the other edge, respectively. Thermoelectric properties, especially the Seebeck coefficient, significantly depend on the electronic band structure and are enhanced when the Fermi level is in the energy gap. However, the thermoelectric efficiency is significantly reduced when the phonon contribution to the heat conductance is included. This phonon contribution has been calculated numerically by two different methods. Transition from antiferromagnetic to ferromagnetic states leads to a large magnetoresistance as well as to a considerable magnetothermopower. Thermoelectric parameters in the antiparallel configuration, when spin polarization in the left part of the nanoribbon is opposite to that in the right part, are also analyzed. © 2013 American Physical Society.
|Journal series||Physical Review B, ISSN 1098-0121|
|Score|| = 35.0, 05-03-2020, ArticleFromJournal|
= 35.0, 05-03-2020, ArticleFromJournal
|Publication indicators||= 74; = 20.0; : 2013 = 1.326; : 2013 = 3.664 (2) - 2013=3.564 (5)|
|Citation count*||20 (2015-02-04)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.