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Article: On the possible identification of defects using the autocorrelation function approach in double Doppler broadening of annihilation radiation spectroscopy

TitleOn the possible identification of defects using the autocorrelation function approach in double Doppler broadening of annihilation radiation spectroscopy
Authors
Issue Date1998
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpcm
Citation
Journal Of Physics Condensed Matter, 1998, v. 10 n. 46, p. 10475-10492 How to Cite?
AbstractThe recent revived interest in the use of double-Doppler broadening of annihilation radiation (D-DBAR) spectroscopy, which employs two Ge detectors in back-to back geometry has stemmed mainly from its potential in defect identification as a result of its elemental sensitivity through core annihilations in atoms at the defect site. Emphasis has thus largely concentrated on the high momentum spectral range. In contrast the present work emphasizes the need to also focus attention on the low momentum region of the D-DBAr spectra. It is argued that the √2 improved resolving power of D-DBAR, in conjunction with spectral deconvolution, should give future ID (one dimensional) momentum data approaching in quality those obtainable using 1D-ACAR (angular correlation of annihilation radiation), thus formaing an alternative technique for observing the structure containing diffraction patterns that originate from annihilations with localized electron states at positron trapping defects. Rotation of the sample about a specified crystal axis, and the binning of events by angle, is suggested as a means of extending the technique to form a 2D- (two dimensional) DBAR counterpart to 2D-ACAR. The advantages of considering the real space positron electron wavefunction product AF (autocorrelation function), obtained by simple manipulation of the D-DBAR data in Fourier space, are outlined. In particular the possible visualization offered in real space of a defect's physical geometry, with the prospect of building up a library of contour patterns for future defect identification, is discussed, taking the silicon monovacancy in Si and the negative As vacancy in GaAs as examples.
Persistent Identifierhttp://hdl.handle.net/10722/80501
ISSN
2015 Impact Factor: 2.209
2015 SCImago Journal Rankings: 0.812
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorBeling, CDen_HK
dc.contributor.authorLiMing, Wen_HK
dc.contributor.authorShan, YYen_HK
dc.contributor.authorCheung, SHen_HK
dc.contributor.authorFung, Sen_HK
dc.contributor.authorPanda, BKen_HK
dc.contributor.authorSeitsonen, APen_HK
dc.date.accessioned2010-09-06T08:07:09Z-
dc.date.available2010-09-06T08:07:09Z-
dc.date.issued1998en_HK
dc.identifier.citationJournal Of Physics Condensed Matter, 1998, v. 10 n. 46, p. 10475-10492en_HK
dc.identifier.issn0953-8984en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80501-
dc.description.abstractThe recent revived interest in the use of double-Doppler broadening of annihilation radiation (D-DBAR) spectroscopy, which employs two Ge detectors in back-to back geometry has stemmed mainly from its potential in defect identification as a result of its elemental sensitivity through core annihilations in atoms at the defect site. Emphasis has thus largely concentrated on the high momentum spectral range. In contrast the present work emphasizes the need to also focus attention on the low momentum region of the D-DBAr spectra. It is argued that the √2 improved resolving power of D-DBAR, in conjunction with spectral deconvolution, should give future ID (one dimensional) momentum data approaching in quality those obtainable using 1D-ACAR (angular correlation of annihilation radiation), thus formaing an alternative technique for observing the structure containing diffraction patterns that originate from annihilations with localized electron states at positron trapping defects. Rotation of the sample about a specified crystal axis, and the binning of events by angle, is suggested as a means of extending the technique to form a 2D- (two dimensional) DBAR counterpart to 2D-ACAR. The advantages of considering the real space positron electron wavefunction product AF (autocorrelation function), obtained by simple manipulation of the D-DBAR data in Fourier space, are outlined. In particular the possible visualization offered in real space of a defect's physical geometry, with the prospect of building up a library of contour patterns for future defect identification, is discussed, taking the silicon monovacancy in Si and the negative As vacancy in GaAs as examples.en_HK
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpcmen_HK
dc.relation.ispartofJournal of Physics Condensed Matteren_HK
dc.titleOn the possible identification of defects using the autocorrelation function approach in double Doppler broadening of annihilation radiation spectroscopyen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0953-8984&volume=10&spage=10475&epage=10492&date=1998&atitle=On+the+Possible+Identification+of+Defects+Using+the+Autocorrelation+Function+Approach+in+Double+Doppler+Broadening+of+Annihilation+Radiation+Spectroscopyen_HK
dc.identifier.emailBeling, CD: cdbeling@hkucc.hku.hken_HK
dc.identifier.emailCheung, SH: singhang@hku.hken_HK
dc.identifier.emailFung, S: sfung@hku.hken_HK
dc.identifier.authorityBeling, CD=rp00660en_HK
dc.identifier.authorityCheung, SH=rp00590en_HK
dc.identifier.authorityFung, S=rp00695en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/0953-8984/10/46/015en_HK
dc.identifier.scopuseid_2-s2.0-0009768081en_HK
dc.identifier.hkuros38929en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0009768081&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume10en_HK
dc.identifier.issue46en_HK
dc.identifier.spage10475en_HK
dc.identifier.epage10492en_HK
dc.identifier.isiWOS:000077430800015-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridBeling, CD=7005864180en_HK
dc.identifier.scopusauthoridLiMing, W=24401511900en_HK
dc.identifier.scopusauthoridShan, YY=7203036700en_HK
dc.identifier.scopusauthoridCheung, SH=7202473508en_HK
dc.identifier.scopusauthoridFung, S=7201970040en_HK
dc.identifier.scopusauthoridPanda, BK=22963418500en_HK
dc.identifier.scopusauthoridSeitsonen, AP=7004093445en_HK

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