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Article: The microscopic structure of DX centers in Cd 0.8Zn 0.2Te:Cl

TitleThe microscopic structure of DX centers in Cd 0.8Zn 0.2Te:Cl
Authors
KeywordsA Centers
CdZnTe
Doppler Broadening
DX Centers
Two-Detector Coincidence
Issue Date1997
PublisherTrans Tech Publications Ltd. The Journal's web site is located at http://www.scientific.net
Citation
Materials Science Forum, 1997, v. 255-257, p. 506-508 How to Cite?
AbstractThe microscopic structure of chlorine DX centers was studied in Cd0.8Zn0.2Te:Cl by positron annihilation and thermoelectric current measurements. Photoexcitation of the DX centers induces a transition of the Cl atoms to the shallow-donor state and persistent photoconductivity (PPC) at low temperature. The DX state is recovered by annealing at 140 K where the relaxation of the substitutional Cl atoms to the DX state was observed. The shallow-deep transition is coincident with a sharp decrease of the positron line-shape parameter and a significant increase of annihilation with high-momentum core electrons. The results indicate positron trapping and annihilation at chlorine A centers after photoexcitation and at DX centers after annealing. Among the three configurations proposed for Cl DX centers in Cd 1-xZn xTe the data support the bond-breaking geometry and the relaxation of the Cl and Cd(Zn) atoms along the [111] direction. The thermal barrier for the shallow-deep transition was found to be 0.44 eV.
Persistent Identifierhttp://hdl.handle.net/10722/174749
ISSN
2005 Impact Factor: 0.399
References

 

DC FieldValueLanguage
dc.contributor.authorShan, YYen_HK
dc.contributor.authorLynn, KGen_HK
dc.contributor.authorSzeles, Csen_HK
dc.contributor.authorAsokaKumar, Pen_HK
dc.contributor.authorThio, Ten_HK
dc.contributor.authorBennett, JWen_HK
dc.contributor.authorBeling, CBen_HK
dc.contributor.authorFung, Sen_HK
dc.contributor.authorBecla, Pen_HK
dc.date.accessioned2012-11-26T08:47:14Z-
dc.date.available2012-11-26T08:47:14Z-
dc.date.issued1997en_HK
dc.identifier.citationMaterials Science Forum, 1997, v. 255-257, p. 506-508en_HK
dc.identifier.issn0255-5476en_HK
dc.identifier.urihttp://hdl.handle.net/10722/174749-
dc.description.abstractThe microscopic structure of chlorine DX centers was studied in Cd0.8Zn0.2Te:Cl by positron annihilation and thermoelectric current measurements. Photoexcitation of the DX centers induces a transition of the Cl atoms to the shallow-donor state and persistent photoconductivity (PPC) at low temperature. The DX state is recovered by annealing at 140 K where the relaxation of the substitutional Cl atoms to the DX state was observed. The shallow-deep transition is coincident with a sharp decrease of the positron line-shape parameter and a significant increase of annihilation with high-momentum core electrons. The results indicate positron trapping and annihilation at chlorine A centers after photoexcitation and at DX centers after annealing. Among the three configurations proposed for Cl DX centers in Cd 1-xZn xTe the data support the bond-breaking geometry and the relaxation of the Cl and Cd(Zn) atoms along the [111] direction. The thermal barrier for the shallow-deep transition was found to be 0.44 eV.en_HK
dc.languageengen_US
dc.publisherTrans Tech Publications Ltd. The Journal's web site is located at http://www.scientific.neten_HK
dc.relation.ispartofMaterials Science Forumen_HK
dc.subjectA Centersen_HK
dc.subjectCdZnTeen_HK
dc.subjectDoppler Broadeningen_HK
dc.subjectDX Centersen_HK
dc.subjectTwo-Detector Coincidenceen_HK
dc.titleThe microscopic structure of DX centers in Cd 0.8Zn 0.2Te:Clen_HK
dc.typeArticleen_HK
dc.identifier.emailBeling, CB: cdbeling@hkucc.hku.hken_HK
dc.identifier.emailFung, S: sfung@hku.hken_HK
dc.identifier.authorityBeling, CB=rp00660en_HK
dc.identifier.authorityFung, S=rp00695en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0031373285en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0031373285&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume255-257en_HK
dc.identifier.spage506en_HK
dc.identifier.epage508en_HK
dc.publisher.placeSwitzerlanden_HK
dc.identifier.scopusauthoridShan, YY=7203036700en_HK
dc.identifier.scopusauthoridLynn, KG=7102392474en_HK
dc.identifier.scopusauthoridSzeles, Cs=7003599473en_HK
dc.identifier.scopusauthoridAsokaKumar, P=7003841018en_HK
dc.identifier.scopusauthoridThio, T=7003540416en_HK
dc.identifier.scopusauthoridBennett, JW=7404252723en_HK
dc.identifier.scopusauthoridBeling, CB=7005864180en_HK
dc.identifier.scopusauthoridFung, S=7201970040en_HK
dc.identifier.scopusauthoridBecla, P=7004035127en_HK

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