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Conference Paper: Momentum-transfer resolved electron energy loss spectroscopy of solids: Problems, solutions and applications

TitleMomentum-transfer resolved electron energy loss spectroscopy of solids: Problems, solutions and applications
Authors
Issue Date1995
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/ultramic
Citation
Ultramicroscopy, 1995, v. 59 n. 1-4, p. 109-119 How to Cite?
AbstractThe critical issues in experimental momentum-transfer (q) resolved EELS in TEM are outlined. It is shown that despite the presence of various multiple scattering events, meaningful information about the symmetry of electronic states can be obtained. Such q-resolved electron energy loss spectroscopy of the valence band transitions in BaBiO3 has revealed that the dispersion of the optical gap (~2 eV) with q is anisotropic and that an optically forbidden transition is present at 4.5 eV. The oscillator strength of the forbidden transition is stronger for q along [100], but weaker along [110]. A molecular orbital model is proposed and the forbidden transition is assigned to be the excitation from the O 2pσ non-bonding states to the empty Bi (6s) state. The model is in good agreement with the physical properties of the transition.
Persistent Identifierhttp://hdl.handle.net/10722/176145
ISSN
2015 Impact Factor: 2.874
2015 SCImago Journal Rankings: 2.140
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, YYen_US
dc.contributor.authorCheng, SCen_US
dc.contributor.authorDravid, VPen_US
dc.contributor.authorZhang, FCen_US
dc.date.accessioned2012-11-26T09:06:25Z-
dc.date.available2012-11-26T09:06:25Z-
dc.date.issued1995en_US
dc.identifier.citationUltramicroscopy, 1995, v. 59 n. 1-4, p. 109-119en_US
dc.identifier.issn0304-3991en_US
dc.identifier.urihttp://hdl.handle.net/10722/176145-
dc.description.abstractThe critical issues in experimental momentum-transfer (q) resolved EELS in TEM are outlined. It is shown that despite the presence of various multiple scattering events, meaningful information about the symmetry of electronic states can be obtained. Such q-resolved electron energy loss spectroscopy of the valence band transitions in BaBiO3 has revealed that the dispersion of the optical gap (~2 eV) with q is anisotropic and that an optically forbidden transition is present at 4.5 eV. The oscillator strength of the forbidden transition is stronger for q along [100], but weaker along [110]. A molecular orbital model is proposed and the forbidden transition is assigned to be the excitation from the O 2pσ non-bonding states to the empty Bi (6s) state. The model is in good agreement with the physical properties of the transition.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/ultramicen_US
dc.relation.ispartofUltramicroscopyen_US
dc.titleMomentum-transfer resolved electron energy loss spectroscopy of solids: Problems, solutions and applicationsen_US
dc.typeConference_Paperen_US
dc.identifier.emailZhang, FC: fuchun@hkucc.hku.hken_US
dc.identifier.authorityZhang, FC=rp00840en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/0304-3991(95)00022-Sen_US
dc.identifier.scopuseid_2-s2.0-0029122965en_US
dc.identifier.volume59en_US
dc.identifier.issue1-4en_US
dc.identifier.spage109en_US
dc.identifier.epage119en_US
dc.identifier.isiWOS:A1995RW03300010-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridWang, YY=36067280700en_US
dc.identifier.scopusauthoridCheng, SC=7404685555en_US
dc.identifier.scopusauthoridDravid, VP=7006743138en_US
dc.identifier.scopusauthoridZhang, FC=14012468800en_US

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