Date of Graduation
12-2017
Document Type
Thesis
Degree Name
Master of Science in Physics (MS)
Degree Level
Graduate
Department
Physics
Advisor/Mentor
Salvador Barraza-Lopez
Committee Member
Suredra Singh
Second Committee Member
Hugh Churchill
Keywords
Monolayer, Multiferroicity, SnO Monolayers, Structural Degenarcies, Two-dimensional Phase Transition
Abstract
Chalcogen-based layered superconductors with a litharge structure such as FeS and FeSe mono-layers undergo structural and superconducting phase transitions that are tunable by doping. Representing another material platform with a litharge structure but without valence d-electrons, SnO monolayers also display a structural ground state with a degenerate rectangular unit cell at zero temperature and a charge-tunable energy barrier that leads to a thermally-controllable structural phase change. Doped SnO monolayers with rectangular degenerate unit cells give rise to two-dimensional multiferroicity. Their two-dimensional elastic energy landscape adopts a basic analytic expression that is employed to discuss this structural transition. The results contained in this thesis increase our intuition on two-dimensional phase transitions and their effects on the properties of two-dimensional atomic materials with structural degeneracies.
Citation
Sharmin, A. (2017). Structural and Elastic Properties of Degenerate SnO Monolayers at Finite Temperature. Graduate Theses and Dissertations Retrieved from https://scholarworks.uark.edu/etd/2565
Included in
Atomic, Molecular and Optical Physics Commons, Nanoscience and Nanotechnology Commons, Semiconductor and Optical Materials Commons