Electronic, phonon and superconducting properties of LaPtBi half-Heusler compound. (May 2018)

• Record Type: Journal Article
• Authors: Shrivastava, Deepika; Sanyal, Sankar P.
• Is Part Of: Solid state communications. Volume 273(2018)
• Page Start: 1
• Page End: 4
• Publication Date: 2018-05
• Subjects: A. Half-Heusler compounds -- D. Electronic structure -- D. Phonon properties -- D. Superconducting transition temperature; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2018.01.018
• Languages: English
• ISSNs: 0038-1098

Abstract

Abstract: In the framework of density functional theory based on plane wave pseudopotential method and linear response technique, we have studied the electronic, phonon and superconducting properties of LaPtBi half-Heusler compound. The electronic band structure and density of states show that it is gapless semiconductor which is consistent with previous results. The positive phonon frequencies confirm the stability of this compound in cubic MgAgAs phase. Superconductivity is studied in terms of Eliashberg spectral function (α 2 F(ω)), electron-phonon coupling constants (λ). The value of electron-phonon coupling parameter is found to be 0.41 and the superconducting transition temperature is calculated to be 0.76 K, in excellent agreement with the experimentally reported values. Highlights: The superconducting properties have been studied for LaPtBi half-Heusler compound. Calculated superconducting transition temperature TC is 0.76 K, which agree well with experimental values. Phonon dispersion curves show that the LaPtBi is dynamically stable in Cubic (MgAgAs-type) phase at ambient pressure.