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Theoretical Investigations Of Core-Level Spectroscopies In Strongly Correlated Systems

Ever since the discovery of exotic phenomena like high temperature (Tc) superconductivity
in the cuprates and colossal magnetoresistance in the manganites, strongly correlated electron systems have become the center of attention in the field of condensed matter physics research. This renewed interest has been further kindled by the rapid development of sophisticated experimental techniques and tremendous computational power. Computation plays
a pivotal role in the theoretical investigation of these systems, because one cannot explain their complicated phase diagrams by simple, exactly solvable models. Among the plethora of experimental techniques, various kinds of high energy electron spectroscopies are fast gaining importance due to the multitude of physical properties and phenomena which they
can access. However the physical processes involved and the interpretation of the spectra obtained from these spectroscopies are extremely complex and require extensive theoretical modelling. This thesis is concerned with the theoretical modelling of a certain class of high energy electron spectroscopies, viz. the core-level electron spectroscopies, for strongly correlated systems of various kinds. The spectroscopies covered are Auger electron spectroscopy
(AES), core-level photoemission spectroscopy (core-level PES) and X-ray absorption spec-
troscopy (XAS), which provide non-magnetic information, and also X-ray magnetic circular
and linear dichroism (XMCD and XMLD), which provide magnetic information.












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  1. http://hdl.handle.net/2005/421
Identiferoai:union.ndltd.org:IISc/oai:etd.ncsi.iisc.ernet.in:2005/421
Date12 1900
CreatorsGupta, Subhra Sen
ContributorsSarma, D D
Source SetsIndia Institute of Science
Languageen_US
Detected LanguageEnglish
TypeThesis
RelationG21077

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