کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7839327 1505706 2018 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Positron affinity and bulk lifetime and positronium work function in indium phosphide under pressure
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Positron affinity and bulk lifetime and positronium work function in indium phosphide under pressure
چکیده انگلیسی
The electron and positron chemical potentials, positron affinity and bulk lifetime as well as the positronium work function in InP are investigated. The emphasis of this work is on the hydrostatic pressure effect on these features. The calculations are performed with a pseudopotential approach and the independent particle model. All parameters of interest are found to vary monotonically with pressure. Our findings showed that under compression the positron annihilates differently in InP semiconductor compound. At zero pressure, the positron bulk lifetime is calculated to be 243.47 ps. However, upon compression it decreases almost linearly suggesting the decrease of the crystal ionicity under applied pressure. The positronium work function is found to increase with raising pressure which indicates that under compression less positronium atoms will be formed in InP sample surface and ejected into the vacuum. The parameters investigated in the present work are important in slow-positron-beam experiments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 225, May 2018, Pages 5-9
نویسندگان
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