Electronic transport and angle-resolved photoemission spectroscopy (ARPES) measurements were conducted on two different layered, honeycomb materials: graphene and sodium iridate (Na2IrO3). Graphene, the first two dimensional crystal observed in a laboratory, offers a system to explore novel quantum critical states theoretically predicted under the application of strain. Uniaxial strain was studied in suspended graphene using a microelectromechanical system (MEMS) via electronic transport. Strain was investigated as well by intercalation of C60 at the graphene-substrate (SiC) interface via ARPES. Sodium iridate is a relativistic Mott insulator proximate to the Kitaev model with unconventional electronic structure. An in-gap metallic feature was observed in ARPES measurements of Na2IrO3. Complementary evidence of a metallic conduction channel was observed in electronic transport measurements.
|Commitee:||Gu, Jiyeong, Peterson, Michael|
|School:||California State University, Long Beach|
|Department:||Physics and Astronomy|
|School Location:||United States -- California|
|Source:||MAI 56/05M(E), Masters Abstracts International|
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