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A potential lattice damage scale in swift heavy ion irradiated InP
Author(s) -
Hu Peipei,
Zeng Jian,
Zhang Shengxia,
Zhai Pengfei,
Xu Lijun,
Ai Wensi,
Maaz Khan,
Xue Haizhou,
Li Zongzhen,
Sun Youmei,
Liu Jie,
He Yuan
Publication year - 2021
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.6077
Subject(s) - raman spectroscopy , ion , irradiation , radiation damage , swift heavy ion , materials science , lattice (music) , phonon , spectroscopy , analytical chemistry (journal) , molecular physics , atomic physics , chemistry , condensed matter physics , optics , nuclear physics , physics , fluence , chromatography , organic chemistry , quantum mechanics , acoustics
This article reports a comprehensive study on the damage evolution in InP crystal irradiated by swift heavy ions (SHIs, 129 Xe and 209 Bi). The damage effects were investigated by means of Raman spectroscopy. An analysis of the TO and LO phonon intensities ratio ( I TO / I LO ) for a given geometry will yield insights into the lattice quality. A direct comparison of the experimental and theoretical results of I TO / I LO has been discussed in detail. The experimental results show that the intensity ratio I TO / I LO increases with the increased ion fluences and electron energy loss ( dE/dx ) e . In addition, significant red‐shifts of the LO peak were observed that indicates tensile strain was induced during the energy deposition process. Theoretical analysis suggests that defects and disorders generated in the crystals strongly contribute to the intensity ratio I TO / I LO . By TEM observation, we obtained direct evidence that the proportion of disorders and amorphization is proportional to the ( dE/dx ) e of incident ions, which further confirms that the I TO / I LO ratio measured by Raman spectroscopy is function of irradiation‐induced damages. Therefore, the variation in the intensity ratio I TO / I LO can be used as a nondestructive tool to evaluate the lattice damages in zincblende‐type crystals.