Thermal and thermoelectric response from Keldysh formalism with application to gapped Dirac fermions

• 作者: 朱国宝 杨声远 杨慧敏
• 来源期刊: 中国物理B（英文版）
• 关键词: thermal thermoelectric Green’s function
• 年，卷（期）: 2015,（4）
• 页码范围: 047401-1-047401-5
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/4/047401

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.