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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Thermal Transport in Crystalline and Non-crystalline Solids: Theory and Experiments
Presentation Title Nonlinear Stopping of Phonons in Thermoelectric Crystal PbSe
Author(s) Michael E. Manley, Olle Hellman, Nina Shulumba, Andrew May, Paul Stonaha, Jeffrey Lynn, Vasile Garlea, Ahmet Alatas, Raphael Hermann, Hsin Wang, Brian Sales, Austin Minnich
On-Site Speaker (Planned) Michael E. Manley
Abstract Scope A strategy for improving thermoelectric efficiency is to reduce the transport of heat without disrupting electronic-transport. The conventional materials science approach of introducing defects or nanostructures to reduce transport of heat in a crystal lattice suffers because such structures also tend to disrupt electronic-transport. Combining inelastic neutron and x-ray scattering with ab initio simulations we identify a mechanism for halting vibrational energy in thermoelectric PbSe that occurs even in a perfect crystal. Intrinsic local modes in perfect crystals were known to occur from nonlinear physics, but here nonlinear localization of a large fraction of an entire phonon occurs - enough to alter the transport properties. Halting phonon propagation also comes with sharpening of the longitudinal acoustic mode due to a loss of phase space for scattering. Our results demonstrate how nonlinear physics beyond conventional perturbations can impact vibrational transport properties.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Advancing Insights into Phonon Thermal Transport with Theory/experiment Interactions
Determining the Impact of Material Microstructure on the Effective Thermal Conductivity Using Mesoscale Simulation and Modeling
Electronic Structure and Thermal Transport Measurement of GdxSb2-xTe3
Impact of Irradiation Induced Nanoscale Defects on Optical and Thermal Properties of Cerium Dioxide
Influence of Irradiation-induced Microstructural Defects on the Thermal Conductivity of Single Crystal Thorium Dioxide
Investigations of the Thermal Conductivity of UN
Lattice Thermal Conductivity of Quartz at High Pressure and Temperature from the Boltzmann Transport Equation
Mesoscale Modeling of Thermal Conductivity of a UO2 and BeO Composite Nuclear Fuel
Multi-scale Thermal Transport Characterization of Nuclear Fuels
Multi Scale Modeling of the Thermal Conductivity: Combining First Principle Calculations with Monte Carlo
Nano- and Micro-scale Thermal Transport in Swift heavy Ion Irradiated Oxides
Non-linear Thermal Resistance Trend with Increasing Bilayer Density
Nonlinear Stopping of Phonons in Thermoelectric Crystal PbSe
Phonon Dispersion and Linewidth in ThO2 Measured by Neutron Scattering
Physics-guided Machine-Learning Design of Aperiodic Superlattices with Maximum Localization of Coherent Phonons
Structural, Transport, Magnetic, and Thermodynamic Studies of Delta-phase of Uranium
Study of Thermal Transport Properties of Thorium Dioxide Single Crystals
The Degradation of the Thermal Conductivity of Oxide Nuclear Fuel
Thermal Transport in Crystalline Solids with Irradiation-Induced Defects: Computational Modeling and Experiments
Thermal Transport in Nanostructured Crystalline and Disordered Materials
Thermal Transport in ThO2
Thermal Transport Properties of Uranium Aluminides by First-principles

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