Formulas are derived for the calculation of free carrier absorption in semiconductors with ellipsoidal constant energy surfaces, including the effects of non‐parabolicity, for all important scattering mechanisms. It is shown that simple expressions for the absorption coefficient follow from a mathematically exact formulation only in case of acoustic, nonpolar optical, and inter‐valley scattering. Simple, approximate expressions are also suggested for the evaluation of the absorption coefficient in the case of polar optical phonon and impurity scattering.

A K DAS

B R NAG

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

physica status solidi (b)

The theory of free-carrier absorption (FCA) of IR signals and of electron mobility in n-PbTe is developed, taking into account the anisotropic non-parabolic band structure and the corresponding wave function admixture. Computed values of both FCA and mobility are given for comparison with the available experimental results at 300 and 77 K. It is found that the experimental values of both FCA and mobility at 300 K may be fitted well with theory by choosing a value of 15 eV for the acoustic phonon deformation potential constant and a value of effective mass within 5% of the values reported earlier. For 77 K, the calculated value of FCA is close to the experimental value, but the values of mobility are about 1.5 times higher. These values may be made to agree with the experimental values only by choosing a value of effective mass which is 27% higher than the values obtained from magnetophonon experiments. © 1978.

Journal of Physics and Chemistry of Solids

Free-carrier absorption and electron mobility in n-type PbTe

Physical Review B

High-Field Conductivity of the〈111〉Valleys of Ge

Functional Analysis and Its Applications

Diffusion and quasi-invariant measures on infinite-dimensional Lie groups

Physical Review

Effects of Nonparabolicity on Non-Ohmic Transport in InSb and InAs

Piezoresistance Effect inp-Type PbTe

Journal of the Physical Society of Japan

Free-Carrier Infrared Absorption in III-V Semiconductors III. GaAs, InP, GaP and GaSb

Free carrier absorption in semiconductors with nonâ€parabolic and ellipsoidal energy band structures

Journal	physica status solidi (b)
Publisher	-
ISSN	0370-1972