Structural and Elastic Properties of Degenerate SnO Monolayers at Finite Temperature

<p>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. </p>

Name thesis:degree_name

Master of Science in Physics (MS)

Level thesis:degree_level

Thesis

Year dc:date.available

2017

Author dc:creator

• Sharmin, Afsana

Advisor dc:contributor.advisor

• Barraza-Lopez, Salvador

Contributors dc:contributor

• Singh, Surendra P.
• Churchill, Hugh O.H.

• Monolayer
• Multiferroicity
• SnO Monolayers
• Structural Degenarcies
• Two-dimensional Phase Transition
• Atomic, Molecular and Optical Physics
• Nanoscience and Nanotechnology
• Semiconductor and Optical Materials

Repository record dc:identifier

https://scholarworks.uark.edu/etd/2565

OAI identifier oai:identifier

oai:scholarworks.uark.edu:etd-4114