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Title: Composition dependence of the mercury vacancies energy levels in HgCdTe: Evolution of the “negative-U” property

HgCdTe films grown by liquid phase epitaxy with different Cd compositions were post-annealed to control the Hg vacancy concentration. Then temperature-dependent Hall measurements and photoluminescence measurements allowed us to study the evolution of the Hg vacancy acceptor levels with the cadmium composition. For Cd compositions below 33% the Hg vacancies in HgCdTe present a negative-U property with the ionized state V{sup −} stabilized compared to the neutral state V{sup 0}. For Cd compositions higher than 45%, the Hg vacancies in HgCdTe present a more standard level ordering with the ionized state V{sup −} at higher energy than the neutral state V{sup 0}.
Authors:
; ;  [1]
  1. CEA, LETI, Département Optronique, F-38054 Grenoble (France)
Publication Date:
OSTI Identifier:
22258692
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 21; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABUNDANCE; ANNEALING; CADMIUM; ENERGY LEVELS; LIQUID PHASE EPITAXY; MERCURY; PHOTOLUMINESCENCE; TEMPERATURE DEPENDENCE; VACANCIES