中国物理B ›› 2015, Vol. 24 ›› Issue (4): 47401-047401.doi: 10.1088/1674-1056/24/4/047401
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Thermal and thermoelectric response from Keldysh formalism with application to gapped Dirac fermions
朱国宝a b, 杨慧敏a, 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
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
摘要：
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.
中图分类号: (Electric and thermal conductivity)
- 74.25.fc