Microscopic Structure of {ital DX} Centers in Cd{sub 0.8}Zn{sub 0.2}Te:Cl

Journal Article · Mon Dec 01 04:00:00 EST 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.4473· OSTI ID:550572

Shan, Y Y; Lynn, K G ^[1]; Szeles, C ^[2]; Asoka-Kumar, P ^[3]; Thio, T; Bennett, J W ^[4]; Beling, C B; Fung, S ^[5]; Becla, P ^[6]

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1. Department of Physics, Washington State University, Pullman, Washington 99164 (United States)
2. eV Products, a division of II-VI, Inc., Saxonburg, Pennsylvania 16056 (United States)
3. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
4. NEC Research Institute, Princeton, New Jersey 08540 (United States)
5. Department of Physics, The University of Hong Kong (Hong Kong)
6. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Massachusetts 02139 (United States)

Photoexcitation of chlorine {ital DX} centers induces a transition of the Cl atoms to the shallow-donor state and persistent photoconductivity at low temperature in Cd{sub 0.8 }Zn{sub 0.2}Te:Cl. The relaxation of the substitutional Cl atoms to the {ital DX} state at 140K is coincident with a decrease of the positron line-shape parameter and an increase of annihilation with high-momentum core electrons. The results indicate positron trapping and annihilation at {ital DX} centers and at chlorine {ital A} centers. The data support the bond breaking model of the {ital DX} centers and the outward relaxation of the Cl and Cd(Zn) atoms along the [111] direction. The thermal barrier for the shallow-deep transition was found to be 0.44eV. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Brookhaven National Laboratory
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 550572
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 22 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CADMIUM ALLOYS
CHLORINE ADDITIONS
CRYSTAL DEFECTS
MICROSTRUCTURE
PHOTOCONDUCTIVITY
TELLURIUM ALLOYS
TEMPERATURE DEPENDENCE
THERMOELECTRIC PROPERTIES
ZINC ALLOYS