Lattice Thermal Conductivity of GaAs

• Authors: M. Ataullah Ansari , V. Ashokan , B. Indu , R. Kumar
• Languages of publication: EN

Abstracts

EN

A new approach to evaluate the relaxation times of various collision events responsible for thermal transport has been reported through which various deficiencies of earlier models of lattice thermal conductivity have been resolved. These investigations involve the evaluation of the phonon Green functions via a non-perturbative approach. The new expressions of relaxation times expressions for scattering of phonons by boundaries, atomic impurities, phonon-phonon scattering, electron-phonon scattering are the new features of the theory. The lattice thermal conductivity of three samples of GaAs has been analyzed on the basis of modified Callaway model and fairly good agreement between theory and experimental observations has been reported.

Keywords

EN

63.20.kd; 66.70.Df; 63.22.Rc; 63.20.Ry

Discipline

• 66.70.Df: Metals, alloys, and semiconductors
• 63.20.kd: Phonon-electron interactions
• 63.22.Rc: Phonons in graphene
• 63.20.Ry: Anharmonic lattice modes

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 3
• Pages: 639-646

Dates

published

2012-03

received

2011-06-23

Contributors

author

M. Ataullah Ansari

• Physics Department, Techwords W.G.V.S. Group of Institution, Manglour, Roorkee, 247 667, Uttarakhand, India

author

V. Ashokan

• Department of Physics, Indian Institute of Technology, Roorkee, 247667, Uttarakhand, India

author

B. Indu

• Department of Physics, Indian Institute of Technology, Roorkee, 247667, Uttarakhand, India

author

R. Kumar

• Physics Department, Gurukul Kangri Vishvavidyalaya, Haridwar, 249 404, Uttarakhand, India

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Identifiers

DOI

10.12693/APhysPolA.121.639