Effect of lithium ion irradiation on the transport and optical properties of Bridgman grown n-type InSb single crystals

Dixit, VK and Rodrigues, BV and Bhat, HL and Kumar, R and Venkataraghavan, R and Chandrasekaran, KS and Arora, BM (2001) Effect of lithium ion irradiation on the transport and optical properties of Bridgman grown n-type InSb single crystals. In: Journal of Applied Physics, 90 (4). pp. 1750-1753.

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Abstract

Single crystal (100) wafers of n-InSb were implanted with 50 MeV Li3+ ions at various fluences ranging from 10(10) to 10(14) ions/cm(2) at room temperature. Investigations of the optical, electrical, and structural properties of the as-grown, irradiated, annealed wafers were carried out by infrared and Raman spectroscopies, Hall measurements, and high resolution x-ray diffraction (HRXRD). In the case of samples irradiated with an ion fluence of 1.6x10(14) ions/cm(2), electrical measurements at 80 K reveal that there is a decrease in carrier concentration from 8.5x10(15) (for unirradiated) to 1.1x10(15)/cm(3) and an increase in mobility from 5.4x10(4) to 1.67x10(5) cm(2)/V s. The change in carrier concentration is attributed to the creation of electron trap centers induced by ion beam irradiation and the increase in mobility to the formation of electrical inactive complexes. Nevertheless, even with the irradiation at 1.6x10(14) ions/cm(2) fluence the crystalline quality remains largely unaffected, as is seen from HRXRD and Raman studies. (C) 2001 American Institute of Physics.

Item Type:	Journal Article
Publication:	Journal of Applied Physics
Publisher:	American Institute of Physics
Additional Information:	Copyright of this article belongs to American Institute of Physics.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	02 Aug 2011 06:50
Last Modified:	02 Aug 2011 06:50
URI:	http://eprints.iisc.ac.in/id/eprint/39534

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