| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Thermal and thermoelectric response from Keldysh formalism with application to gapped Dirac fermions |
| Zhu Guo-Bao (朱国宝)a b, Yang Hui-Min (杨慧敏)a, Yang Sheng-Yuan (杨声远)c |
a Department of Physics and Electronic Engineering, Heze University, Heze 274015, China;
b Institute of Theoretical Physics, Heze University, Heze 274015, China;
c Engineering Product Development, Singapore University of Technology and Design, Singapore 138682, Singapore |
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Abstract Based on the Keldysh Green's functions theory, we present a general formula of the thermal and thermoelectric transport. In the clean limit, our formula recovers the previous results obtained from the semiclassical transport theory. In our approach, we propose an appropriate energy current operator and electric current operator, and the unphysical divergence from the direct application of the Kubo formula is eliminated. As an application, we study the thermal and the thermoelectric Hall conductivities of a gapped Dirac fermion model in the presence of impurity scattering.
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Received: 08 November 2014
Revised: 11 December 2014
Accepted manuscript online:
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PACS:
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74.25.fc
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(Electric and thermal conductivity)
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73.50.Lw
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(Thermoelectric effects)
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72.10.-d
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(Theory of electronic transport; scattering mechanisms)
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73.50.Bk
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(General theory, scattering mechanisms)
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| Fund: Project supported by the Special Funds of the National Natural Science Foundation of China (Grant No. 11447145) and the Doctoral Program of Heze University, Shandong Province, China (Grant No. XY14B002). |
Corresponding Authors:
Zhu Guo-Bao
E-mail: zhuguobao@gmail.com
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Cite this article:
Zhu Guo-Bao (朱国宝), Yang Hui-Min (杨慧敏), Yang Sheng-Yuan (杨声远) Thermal and thermoelectric response from Keldysh formalism with application to gapped Dirac fermions 2015 Chin. Phys. B 24 047401
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