Unusual heat flow revealed with first principles theoretical approaches

Unusual heat flow revealed with first principles theoretical approaches

Phonons determine the thermal properties of materials as well as mediating electronic transport. Our research has focused on the physics of phonons, with an emphasis on developing ab initio theoretical descriptions of thermal properties and phonon thermal transport.  This parameter-free theory has yielded excellent agreement with the measured thermal conductivities of a wide range of materials, validating its predictive capability and contributing insight into the nature of heat flow.  Examples of such

Date

November 14, 2016 -
3:00pm to 4:00pm

Location

Pettit Building, (Microelectronics Research Center), Room 102 A & B, 791 Atlantic Drive NW, Atlanta, GA 30332

Affiliation

Boston College

Phonons determine the thermal properties of materials as well as mediating electronic transport. Our research has focused on the physics of phonons, with an emphasis on developing ab initio theoretical descriptions of thermal properties and phonon thermal transport.  This parameter-free theory has yielded excellent agreement with the measured thermal conductivities of a wide range of materials, validating its predictive capability and contributing insight into the nature of heat flow.  Examples of such insight include: a new paradigm for achieving ultrahigh thermal conductivity in bulk crystals, and the prediction that phonon hydrodynamic behavior such as Poiseuille flow and second sound can occur in graphene at unusually high temperatures.  I will also discuss some new directions we’ve initiated involving phonons interacting with electrons, plasmons and magnons.