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Please use this identifier to cite or link to this item: http://hdl.handle.net/2005/421

Title: Theoretical Investigations Of Core-Level Spectroscopies In Strongly Correlated Systems
Authors: Gupta, Subhra Sen
Advisors: Sarma, D D
Keywords: Spectroscopy
High Temperature Superconductors
Electronic Structure
High Energy Electron Spectroscopies
Auger Electron Spectroscopy (AES)
Core-Level Photoemission Spectroscopy (PES)
X-ray Absorption Spectroscopy (XAS)
X-ray Magnetic Circular Dichroism (XMCD)
X-ray Magnetic Linear Dichroism (XMLD)
Strong Correlations
Unusal Doping
Magneto-crystalline Anisotropy
Submitted Date: Dec-2006
Series/Report no.: G21077
Abstract: 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. .
URI: http://etd.iisc.ernet.in/handle/2005/421
Appears in Collections:Physics (physics)

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