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Title Light scattering study of the diluted magnetic semiconductors Zn[sub 1[minus]x]Co[sub x]Se and Zn[sub 1[minus]x]Fe[sub x]Se
Creator/Author Mak, C.L.
Publication Date1993 Jan 01
OSTI IdentifierOSTI ID: 7112363
Resource TypeMiscellaneous
Resource RelationOther Information: Thesis (Ph.D.)
Research OrgOhio State Univ., Columbus, OH (United States)
Subject74 ATOMIC AND MOLECULAR PHYSICS; 36 MATERIALS SCIENCE; COBALT SELENIDES; EMISSION SPECTRA; LATTICE VIBRATIONS; IRON SELENIDES; ZINC SELENIDES; BAND THEORY; CRYSTAL FIELD; DOPED MATERIALS; LIGHT SCATTERING; SEMICONDUCTOR MATERIALS; CHALCOGENIDES; COBALT COMPOUNDS; IRON COMPOUNDS; MATERIALS; SCATTERING; SELENIDES; SELENIUM COMPOUNDS; SPECTRA; TRANSITION ELEMENT COMPOUNDS; ZINC COMPOUNDS
Description/AbstractCrystal field and Band theories provide good descriptions of electrons in the localized and itinerent limits. The 4f and outer s, p electrons are examples of carriers in a solid classified under these respective schemes. In doped semiconductors such as Si:P, the excess electrons approximate as s-like discrete hydrogenic levels that broaden into a band beyond a critical concentration leading to insulator-metal transitions. On the other hand, d-electrons, as realized in diluted magnetic semiconductors (DMS) have intraatomic interactions of intermediate strength and generally fall between these oppositing limits. The interactions between 3d levels can be varied through choice of magnetic dopants as Mn, Fe and Co that are characterized by very different s, p-d and d-d interactions. Further, since the d-level impurity does not provide an excess carrier to the II-VI host lattice these DMS compounds generally remain insulating. In this thesis, the authors will discuss the effects of the enhanced exchange interactions, the disorder and the influence of external pressure on the emission spectra and lattice vibrations in both Zn[sub 1[minus]x]Co[sub x]Se and Zn[sub 1[minus]x]Fe[sub x]Se.
PublisherColumbus, OH (United States); Ohio State Univ.
Country of PublicationUnited States
LanguageEnglish
FormatMedium: X; Size: Pages: (198 p)
AvailabilityUniversity Microfilms, P.O. Box 1764, Ann Arbor, MI 48106 (United States). Order No. 93-25,548
System Entry Date2008 Feb 12

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