Improving thermoelectric performance of α−T3 structure via integration of the Kane-Mele-Hubbard model

Our research examines the electronic thermal conductivity, electrical conductivity, Seebeck coefficient, and figure of merit of the α-T3 structure utilizing the Green's function approach within the Hamiltonian framework of the Kane-Mele (KM) and Hubbard models. We evaluate how variations in che...

Full description

Saved in:
Bibliographic Details
Published inPhysica. B, Condensed matter Vol. 695; p. 416563
Main Authors Abdi, Mona, Astinchap, Bandar
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.12.2024
Subjects
Kane-Mele model
On-site Coulomb repulsion
Seebeck coefficient
Spin-orbit coupling
α-T3 structure
Seebeck coefficient
Spin-orbit coupling
Kane-Mele model
α-T3 structure
On-site Coulomb repulsion
Online AccessGet full text

Cover

More Information
Summary:Our research examines the electronic thermal conductivity, electrical conductivity, Seebeck coefficient, and figure of merit of the α-T3 structure utilizing the Green's function approach within the Hamiltonian framework of the Kane-Mele (KM) and Hubbard models. We evaluate how variations in chemical potential, on-site Coulomb repulsion (OSCR) strength, and spin-orbit coupling (SOC) parameters influence these properties. Our findings uncover interesting trends: the presence of a flat band at the energy level of zero within this structure and the gap between the flat band and other bands is observed. The observable rise in SOC results in a clear division within the energy band, demonstrating the notable impact SOC exerts on the electronic structure of the system.Moreover, this strategy displays that this material's thermoelectric properties increase due to temperature, SOC, and OSCR. Also, it was observed that augmenting the α parameter can enhance both thermoelectric and thermopower.
ISSN:0921-4526
DOI:10.1016/j.physb.2024.416563