AbstractsAstronomy & Space Science

Bond patterns in the ground states of quasi-one dimensional 1/4-filled organic superconductors

by Andrew Bryan Ward

Institution: Mississippi State University
Department: Physics and Astronomy
Degree: MS
Year: 2015
Keywords: exact diagonalization; Lanczos; quantum Monte Carlo; organic superconductors
Record ID: 2063080
Full text PDF: http://sun.library.msstate.edu/ETD-db/theses/available/etd-03262015-123423/


Organic conductors are of considerable interest to the condensed matter community. In contrast to conventional metal conductors, these organic materials allow for large variability in their construction giving both quasi-one and two dimensional behavior. Organic superconductors also give useful insight into the properties of general superconductivity as well as insight into the properties of strongly correlated electronic materials. These materials exhibit interesting phenomena like spin-Peierls, antiferromagnetic, and superconducting phases. The aim of this thesis is not only to inform the reader of various studies into organic superconductors but also to advance research into these materials through massively parallel numerical methods. This thesis will cover two studies: a quantum Monte Carlo study on an infinite one-dimensional chain and an exact diagonalization study on a 16-site two-dimensional lattice. These studies will be used to better understand the charge and bond behavior of quasi-one dimensional 1/4-filled organic superconductors.