Pratt New Faculty Lecture
Friday, February 10, 2017
12:00 pm - 12:01 pm
Fitzpatrick Center Schiciano Auditorium Side A
Dr. Olivier Delaire
Atomic Dynamics in Energy MaterialsOlivier Delaire, PhDAssociate Professor of Mechanical Engineering and Materials ScienceAssociate Professor of PhysicsDuke University Abstract:Current and future technologies rely on the design of materials with targeted functionalities, which stem from the materials' microscopic structure. For energy applications in particular, materials development and optimization require an atomistic understanding of energy transport and conversion processes. The atoms that make up materials are not static, and the research in our group focuses on probing and understanding how the atomic dynamics affect the micro- and macroscopic material behavior. Measuring and rationalizing atomic dynamics is critical for establishing microscopic theories of thermal transport and thermodynamics. Modern large-scale instrumentation has revolutionized our ability to characterize the atomic structure and vibrations (phonons) in materials, with synchrotron x-ray beams and neutron beams providing us with comprehensive "big data". In addition, quantum mechanical computer simulations of the atomic dynamics enable the rationalization of these extensive experimental datasets. This lecture will illustrate how, by combining experiments and simulations, our group investigates how atomic vibrations impact functional performance in thermoelectrics, ferroelectrics, phase-change materials, or superionic conductors for battery materials.