Master of Science (MS)
Physics and Astronomy
First Committee Member
Second Committee Member
Third Committee Member
Keith V. Lawler
Fourth Committee Member
The nanoscale regime of materials has been at the forefront of research and interest in condensed matter physics for many years. In a merger of the fields of two-dimensional (2D) materials and high pressure physics, we present an investigation of the electronic response of carbon-based, van der Waals (vdW) heterostructures in a diamond anvil cell (DAC). Combining these fields presents us with the ability to study the characteristics of such systems both optically, and through electrical transport. Properties such as conductance, band structure, and layer number are considered. The samples in this study are assembled using exfoliation and stacking techniques adapted from the 2D materials community such that atomically thin field-effect transistors can be transferred directly onto a diamond anvil surface. We discuss various techniques and tools employed to perform photolithography and electron beam deposition on the surface of diamond to make electrical connections to the heterostructures. As a benchmark, we present pressure measurements of MnS2 using photolithographically patterned electrodes. We then present electrical measurements of graphite-gated bilayer graphene at ambient pressure and discuss avenues for future developments. We anticipate these results will lead to an entirely new platform for the investigation of high-quality heterostructures at extreme pressures.
diamond anvil cell; electronic band structure; field effect transistor; graphene; tight binding approximation; van der waals heterostructures
Condensed Matter Physics | Engineering Science and Materials | Materials Science and Engineering | Physics
University of Nevada, Las Vegas
Foskaris, George Thomas, "Towards the Electronic Response of Carbon-Based Van Der Waals Heterostructures in a Diamond Anvil Cell" (2022). UNLV Theses, Dissertations, Professional Papers, and Capstones. 4584.
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