The role of electron–phonon scattering on thermoelectric properties of intermetallic compounds XSi (X = Co, Rh). (20th February 2023)

• Record Type: Journal Article
• Authors: Nam, Ho Ngoc; Suzuki, Katsuhiro; Masago, Akira; Shinya, Hikari; Fukushima, Tetsuya; Sato, Kazunori
• Is Part Of: Japanese journal of applied physics. Volume 62:Number 2(2023)
• Publication Date: 2023-02-20
• Subjects: electronic structure -- transport properties -- electron–phonon scattering -- thermoelectrics -- intermetallic compounds; Physics -- Periodicals; 621.05
• DOI: 10.35848/1347-4065/acb97a
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: In this work, we elucidated the electronic structure and thermoelectric properties of intermetallic X Si ( X = Co, Rh) compounds. By combining first-principles calculations and the Boltzmann equation within electron–phonon average approximation, thermoelectric properties of X Si are well reproduced compared to experimental observations. We found that the considerable Seebeck coefficient and low electrical resistivity give X Si a large power factor, which has the potential for thermoelectric applications. We also discussed the electron mean free paths, a possible factor affecting electrical conductivity when using the nanostructuring approach to optimize the thermoelectric performance.