Influence of crossed electric and quantizing magnetic fields on the Einstein relation in nonlinear optical, optoelectronic and related materials: Simplified theory, relative comparison and suggestion for experimental determination

Pahari, S and Bhattacharya, S and De, D and Adhikari, SM and Niyogi, A and Dey, A and Paitya, N and Saha, SC and Ghatak, KP and Bose, PK (2010) Influence of crossed electric and quantizing magnetic fields on the Einstein relation in nonlinear optical, optoelectronic and related materials: Simplified theory, relative comparison and suggestion for experimental determination. In: Physica B: Condensed Matter, 405 (18). pp. 4064-4078.

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Abstract

An attempt is made to study the Einstein relation for the diffusivity-to-mobility ratio (DMR) under crossed fields' configuration in nonlinear optical materials on the basis of a newly formulated electron dispersion law by incorporating the crystal field in the Hamiltonian and including the anisotropies of the effective electron mass and the spin-orbit splitting constants within the framework of kp formalisms. The corresponding results for III-V, ternary and quaternary compounds form a special case of our generalized analysis. The DMR has also been investigated for II-VI and stressed materials on the basis of various appropriate dispersion relations. We have considered n-CdGeAs2, n-Hg1-xCdxTe, n-In1-xGaxAsyP1-y lattice matched to InP, p-CdS and stressed n-InSb materials as examples. The DMR also increases with increasing electric field and the natures of oscillations are totally band structure dependent with different numerical values. It has been observed that the DMR exhibits oscillatory dependences with inverse quantizing magnetic field and carrier degeneracy due to the Subhnikov-de Haas effect. An experimental method of determining the DMR for degenerate materials in the present case has been suggested. (C) 2010 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	Physica B: Condensed Matter
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belong to Elsevier Science.
Keywords:	Crossed fields configuration;Nonlinear optical;III-V;II-VI; IV-VI;Experimental determination.
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	16 Sep 2010 06:22
Last Modified:	29 Feb 2012 06:20
URI:	http://eprints.iisc.ac.in/id/eprint/32120

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