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dc.contributor.authorVonroos, O. H.
dc.date.accessioned2019-10-24T19:16:32Z
dc.date.available2019-10-24T19:16:32Z
dc.date.created2017-02-28 01:23
dc.date.issued1982-10-15
dc.identifieroai:casi.ntrs.nasa.gov:19830006877
dc.identifierDocument ID: 19830006877
dc.identifierAccession ID: 83N15148
dc.identifierhttp://hdl.handle.net/2060/19830006877
dc.identifier.urihttp://hdl.handle.net/20.500.12424/1029753
dc.description.abstractA theory of deep point defects imbedded in otherwise perfect semiconductor crystals is developed with the aid of pseudopotentials. The dominant short-range forces engendered by the impurity are sufficiently weakened in all cases where the cancellation theorem of the pseudopotential formalism is operative. Thus, effective-mass-like equations exhibiting local effective potentials derived from nonlocal pseudopotentials are shown to be valid for a large class of defects. A two-band secular determinant for the energy eigenvalues of deep defects is also derived from the set of integral equations which corresponds to the set of differential equations of the effective-mass type. Subsequently, the theory in its simplest form, is applied to the system Al(x)Ga(1-x)As:Se. It is shown that the one-electron donor level of Se within the forbidden gap of Al(x)Ga(1-x)As as a function of the AlAs mole fraction x reaches its maximum of about 300 meV (as measured from the conduction band edge) at the cross-over from the direct to the indirect band-gap at x = 0.44 in agreement with experiments.
dc.format.mediumapplication/pdf
dc.rightsNo Copyright
dc.sourceCASI
dc.subjectSOLID-STATE PHYSICS
dc.titleAn investigation of impurity centers in semiconductors of variable composition. Part 1: General theory and some applications
dc.typeNASA-CR-169659
ge.collectioncodeOAIDATA
ge.dataimportlabelOAI metadata object
ge.identifier.legacyglobethics:10668545
ge.identifier.permalinkhttps://www.globethics.net/gtl/10668545
ge.lastmodificationdate2017-02-28 01:23
ge.lastmodificationuseradmin@pointsoftware.ch (import)
ge.submissions0
ge.oai.exportid149001
ge.oai.repositoryid5762
ge.oai.streamid5
ge.setnameGlobeTheoLib
ge.setspecglobetheolib
ge.linkhttp://hdl.handle.net/2060/19830006877


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