University of Waterloo
200 University Avenue West
Waterloo, Ontario, Canada N2L 3G1
Phone: (519) 888-4567 ext 32215
Fax: (519) 746-8115
Department of Physics & Astronomy, Ohio University
David Alan Drabold works on the theory of condensed matter. His work has focused particularly on the physics of amorphous materials, including glasses. In addition to creating realistic computer models of these materials, he has contributed significantly to our understanding of the consequences of structural disorder to electronic, optical and transport properties. He has also developed a number of new computational algorithms for the efficient and accurate simulation of these and other materials using approaches based upon the foundation of quantum mechanics.
Conventional modeling of complex materials usually proceeds by some form of direct atomistic simulation, such at Monte Carlo or Molecular Dynamics, which is often intended to mimic an experimental growth process. In such a simulation, no use is made of a priori information. Often, we possess information from experiments about the materials, or we may wish to design a novel material with a desired property. In this talk, I discuss strategies to build in experimental data as a constraint in the modeling, and also a scheme to impose optical properties (say, opening or closing the optical gap ). The latter method has made it possible to create electronically designed phases of amorphous carbon and silicon using tight-binding molecular dynamics, and with extension to ab initio schemes, to discover the conducting phase of a silver-doped chalcogenide “Conducting Bridge” FLASH memory material.
 A. Pandey, P. Biswas and D. A. Drabold, Phys Rev B 92 155205 (2015).
 K. Prasai, P. Biswas and D. A. Drabold, Sci. Rep. 5 15522 (2015).
K. Prasai, G. Chen and D. A. Drabold, https://arxiv.org/abs/1703.02838