Degree Type
Dissertation
Date of Award
2016
Degree Name
Doctor of Philosophy
Department
Physics and Astronomy
Major
Condensed Matter Physics
First Advisor
Kai-Ming Ho
Abstract
A variety of quantum many-body methods have been developed for studying the strongly correlated electron systems. We have also proposed a computationally efficient and accurate approach, named the correlation matrix renormalization (CMR) method to address the challenges. The theoretic development and benchmark tests of the CMR method are included in this thesis. Meanwhile, ground state total energy is the most important property of electronic calculations. We also investigated an alternative approach to calculate the total energy, and extended this method for magnetic anisotropy energy of ferromagnetic materials. In addition, another theoretical tool, dynamical mean-field theory on top of the density functional theory, has also been used in electronic structure calculations for an Iridium oxide to study the phase transition, which results from an interplay of the d electrons' internal degrees of freedom.
Copyright Owner
Chen Liu
Copyright Date
2016
Language
en
File Format
application/pdf
File Size
94 pages
Recommended Citation
Liu, Chen, "Theoretical development and first-principles analysis of strongly correlated systems" (2016). Graduate Theses and Dissertations. 15957.
https://lib.dr.iastate.edu/etd/15957
