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Article: Positron transport studies at the Au-(InP: Fe) interface
Title | Positron transport studies at the Au-(InP: Fe) interface |
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Authors | |
Issue Date | 1996 |
Publisher | Institute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpcm |
Citation | Journal Of Physics Condensed Matter, 1996, v. 8 n. 10, p. 1403-1412 How to Cite? |
Abstract | Positron mobility and lifetime measurements have been carried out on semi-insulating Fe-doped InP samples with Au contacts used for electric field application. The lifetime measurements, with electric fields directed towards the Au-InP:Fe interface, reveal no component associated with interfacial open-volume sites and thus give no evidence of any positron mobility. The mobility measurements, made using the Doppler-shifted annihilation radiation technique, however, reveal a temperature independent positron mobility of about 20 cm 2 V -1 s -1 in the range 150-300 K. These observations, together with results from I-V analysis, are discussed with reference to two possible band-bending schemes. The first, which requires an ionized shallow donor region adjacent to the Au-InP interface, seems less plausible on a number of grounds. In the second, however, an Fe 2+ negative space charge produces an adverse diffusion barrier for positrons approaching the interface together with a non-uniform electric field in the samples capable of explaining the observed mobility results. |
Persistent Identifier | http://hdl.handle.net/10722/81009 |
ISSN | 2023 Impact Factor: 2.3 2023 SCImago Journal Rankings: 0.676 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Au, HL | en_HK |
dc.contributor.author | Lee, TC | en_HK |
dc.contributor.author | Beling, CD | en_HK |
dc.contributor.author | Fung, S | en_HK |
dc.date.accessioned | 2010-09-06T08:12:44Z | - |
dc.date.available | 2010-09-06T08:12:44Z | - |
dc.date.issued | 1996 | en_HK |
dc.identifier.citation | Journal Of Physics Condensed Matter, 1996, v. 8 n. 10, p. 1403-1412 | en_HK |
dc.identifier.issn | 0953-8984 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/81009 | - |
dc.description.abstract | Positron mobility and lifetime measurements have been carried out on semi-insulating Fe-doped InP samples with Au contacts used for electric field application. The lifetime measurements, with electric fields directed towards the Au-InP:Fe interface, reveal no component associated with interfacial open-volume sites and thus give no evidence of any positron mobility. The mobility measurements, made using the Doppler-shifted annihilation radiation technique, however, reveal a temperature independent positron mobility of about 20 cm 2 V -1 s -1 in the range 150-300 K. These observations, together with results from I-V analysis, are discussed with reference to two possible band-bending schemes. The first, which requires an ionized shallow donor region adjacent to the Au-InP interface, seems less plausible on a number of grounds. In the second, however, an Fe 2+ negative space charge produces an adverse diffusion barrier for positrons approaching the interface together with a non-uniform electric field in the samples capable of explaining the observed mobility results. | en_HK |
dc.language | eng | en_HK |
dc.publisher | Institute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpcm | en_HK |
dc.relation.ispartof | Journal of Physics Condensed Matter | en_HK |
dc.title | Positron transport studies at the Au-(InP: Fe) interface | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0953-8984&volume=8&spage=1403&epage=1412&date=1996&atitle=Positron+transport+studies+at+the+Au-(InP:Fe)+interface | en_HK |
dc.identifier.email | Beling, CD: cdbeling@hkucc.hku.hk | en_HK |
dc.identifier.email | Fung, S: sfung@hku.hk | en_HK |
dc.identifier.authority | Beling, CD=rp00660 | en_HK |
dc.identifier.authority | Fung, S=rp00695 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1088/0953-8984/8/10/012 | en_HK |
dc.identifier.scopus | eid_2-s2.0-4243087405 | en_HK |
dc.identifier.hkuros | 9546 | en_HK |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-4243087405&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 8 | en_HK |
dc.identifier.issue | 10 | en_HK |
dc.identifier.spage | 1403 | en_HK |
dc.identifier.epage | 1412 | en_HK |
dc.identifier.isi | WOS:A1996TZ27400012 | - |
dc.publisher.place | United Kingdom | en_HK |
dc.identifier.scopusauthorid | Au, HL=7004152230 | en_HK |
dc.identifier.scopusauthorid | Lee, TC=36347141200 | en_HK |
dc.identifier.scopusauthorid | Beling, CD=7005864180 | en_HK |
dc.identifier.scopusauthorid | Fung, S=7201970040 | en_HK |
dc.identifier.issnl | 0953-8984 | - |