Swift Heavy Ion induced effects in III-V compound semiconductors : Ion beam modification studies of GaAs and GaN semiconductors

ISBN-13: 9783659854774 / Angielski / Miękka / 2016 / 156 str.

Devaraju Gurram; Anand P. Pathak

Opis

This book deals with ion beam modifications and characterization of low dimensional semiconductors. For ion beams at velocities comparable to target electrons, the interaction is inelastic and induces competing processes leading to electronic and lattice defects. Effects are such that interfaces of multi quantum well structures change with ion beam conditions. The defect migration and annihilation induced by ion beam bombardment, as a function of electronic energy loss and fluence have been discussed. The initially strained and relaxed materials are further strained leading to band gap modification which is otherwise impossible to achieve. We have discussed the disorder activated modes and measured compressive strain as a function of electronic energy loss using Raman spectroscopy. Yellow and blue luminescence from Ga and N related defects in GaN have also been discussed. The band gap modification upon irradiation and subsequent rapid thermal annealing in GaAs related compound semiconductors is reported and discussed.

O autorze

Dr Devaraju Gurram is a Postdoctoral Fellow at Nanostructure's Group,University of Padova,Italy and Faculty in Physics at IIIT Basara,Telangana, India. Prof Anand P Pathak is a CSIR Emeritus Professor at School of Physics, University of Hyderabad, India.