We present the results of our numerical studies on the transport properties of strongly correlated nanostructures, particularly quantum dots and single molecules. The main focus is on correlation, interference and phononic effects. Interesting interferences are observed in multilevel quantum dots, and under the appropriate conditions, a novel ferromagnetic phase is observed in coupled double-level quantum dots at quarter filling. Our simulations of experiments involving nonlocal spin control provide more insight of the experimentally observed results. In the case of single molecules, our study of phonon effects reveals that the center-of-mass motion opens a new channel for transport. This channel can interfere destructively with the purely electronic channel leading to a conductance dip. Finally, we propose a new technique to study nanotransport based on the adaptive time-dependent density-matrix renormalization group. The technique is tested for different cases and is very promising particularly in the nonequilibrium case where most other techniques cannot be applied. / A Dissertation submitted to the Department of Physics in partial fulfillment of the
requirements for the degree of Doctor of Philosophy. / Degree Awarded: Summer Semester, 2007. / Date of Defense: May 30, 2007. / Quantum Dots, Transport, Correlated Electrons, Kondo Effect / Includes bibliographical references. / Nicholas Bonesteel, Professor Directing Dissertation; Naresh Dalal, Outside Committee Member; Jorge Piekarewicz, Committee Member; David Lind, Committee Member; Jianming Cao, Committee Member.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_168227 |
| Contributors | Al-Hassanieh, Khaled (authoraut), Bonesteel, Nicholas (professor directing dissertation), Dalal, Naresh (outside committee member), Piekarewicz, Jorge (committee member), Lind, David (committee member), Cao, Jianming (committee member), Department of Physics (degree granting department), Florida State University (degree granting institution) |
| Publisher | Florida State University |
| Source Sets | Florida State University |
| Language | English, English |
| Detected Language | English |
| Type | Text, text |
| Format | 1 online resource, computer, application/pdf |
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