Lattice thermal conduction in cadmium arsenide

Title

Lattice thermal conduction in cadmium arsenide

Creator

Chinnappagoudra R.F.; Kamatagi M.D.; Patil N.R.; Sankeshwar N.S.

Description

Lattice thermal conductivity (LTC) of cadmium arsenide (Cd3As2) is studied over a wide temperature range (1-400 K) by employing the Callaway model. The acoustic phonons are considered to be the major carriers of heat and to be scattered by the sample boundaries, disorder, impurities, and other phonons via both Umklapp and normal phonon processes. Numerical calculations of LTC of Cd3As2 bring out the relative importance of the scattering mechanisms. Our systematic analysis of recent experimental data on thermal conductivity (TC) of Cd3As2 samples of different groups, presented in terms of LTC, ? L, using a nonlinear regression method, reveals good fits to the TC data of the samples considered for T < ? 50 K, and suggests a value of 0.2 for the Gruneisen parameter. It is, however, found that for T > 100 K the inclusion of the electronic component of TC, ? e, incorporating contributions from relevant electron scattering mechanisms, is needed to obtain good agreement with the TC data over the wide temperature range. More detailed investigations of TC of Cd3As2 are required to better understand its suitability in thermoelectric and thermal management devices. 2022 Chinese Physical Society and IOP Publishing Ltd.

Source

Chinese Physics B, Vol-31, No. 11

Date

2022-01-01

Publisher

Institute of Physics

Subject

Cd₃As₂; dirac semimetals; phonon scattering; thermal conductivity

Coverage

Chinnappagoudra R.F., Department of Physics, S. S. Government First Grade College, Karnataka, Nargund, 582 207, India, Research Resource Centre, Visvesvaraya Technological University, Karnataka, Belagavi, 590 018, India; Kamatagi M.D., Department of Physics, S. S. Government First Grade College, Karnataka, Nargund, 582 207, India; Patil N.R., Department of Physics, B V B College of Engineering and Technology, Karnataka, Hubli, 580031, India; Sankeshwar N.S., Department of Physics & Electronics, CHRIST (Deemed to be University), Karnataka, Bangalore, 560 029, India

Rights

Restricted Access

Relation

ISSN: 16741056

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.1088/1674-1056/ac7863

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