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Positron probes of the Ge(1 0 0) surface: The effects of surface reconstructions and electron-positron correlations on positron trapping and annihilation characteristics

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dc.contributor.author Fazleev N.
dc.contributor.author Jung E.
dc.contributor.author Weiss A.
dc.date.accessioned 2018-09-18T20:06:51Z
dc.date.available 2018-09-18T20:06:51Z
dc.date.issued 2007
dc.identifier.issn 0168-583X
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/136631
dc.description.abstract Positron annihilation induced Auger electron spectroscopy (PAES) has been applied to study the Ge(1 0 0) surface. The high-resolution PAES spectrum from the Ge(1 0 0) surface displays several strong Auger peaks corresponding to M4,5N1N2,3, M2,3M4,5M4,5, M2,3M4,5V and M1M4,5M4,5 Auger transitions. The integrated peak intensities of Auger transitions are used to obtain experimental annihilation probabilities for the Ge 3d and 3p core level electrons. These experimental results are analyzed by performing calculations of positron surface states and annihilation characteristics of surface trapped positrons with relevant Ge core-level electrons for the non-reconstructed and reconstructed Ge(1 0 0)-p(2 × 1), Ge(1 0 0)-p(2 × 2) and Ge(1 0 0)-c(4 × 2) surfaces. It is found that the positron surface state wave function extends into the Ge lattice in the regions where atoms are displaced from their ideal terminated positions due to reconstructions. Estimates of the positron binding energy and the positron annihilation characteristics reveal their sensitivity to the specific atomic structure of the topmost layers of Ge(1 0 0). A comparison with PAES data reveals an agreement with theoretical core annihilation probabilities for the Auger transitions considered. © 2007 Elsevier B.V. All rights reserved.
dc.relation.ispartofseries Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
dc.subject Annihilation
dc.subject Auger
dc.subject Germanium
dc.subject Positron
dc.subject Reconstruction
dc.subject Semiconductor
dc.subject Surface
dc.title Positron probes of the Ge(1 0 0) surface: The effects of surface reconstructions and electron-positron correlations on positron trapping and annihilation characteristics
dc.type Article
dc.relation.ispartofseries-issue 1-2 SPEC. ISS.
dc.relation.ispartofseries-volume 261
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 879
dc.source.id SCOPUS0168583X-2007-261-12-SID34447275035


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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