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

Journal Article · Sat Dec 07 00:00:00 EST 2013 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4840895· OSTI ID:22258692

Gemain, F.; Robin, I. C.; Feuillet, G. ^[1]

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1. CEA, LETI, Département Optronique, F-38054 Grenoble (France)

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}.

• OSTI ID: 22258692
• Journal Information: Journal of Applied Physics, Vol. 114, Issue 21; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ANNEALING
CADMIUM
ENERGY LEVELS
LIQUID PHASE EPITAXY
MERCURY
PHOTOLUMINESCENCE
TEMPERATURE DEPENDENCE
VACANCIES