246 citations · 2.1k across the 61 of their papers we have counts for
19 papers · 1 filter
High Phonon Scattering Rates Suppress Thermal Conductivity in Hyperstoichiometric Uranium Dioxide
Hao Ma, Matthew S. Bryan, Judy W. L. Pang +4
Uranium dioxide (UO), one of the most important nuclear fuels, can accumulate excess oxygen atoms as interstitial defects, which significantly impacts thermal properties. In th…
The generalized quasiharmonic approximation via space group irreducible derivatives
Mark A. Mathis, Amey Khanolkar, Lyuwen Fu +9
The quasiharmonic approximation (QHA) is the simplest nontrivial approximation for interacting phonons under constant pressure, bringing the effects of anharmonicity into temperatu…
Validating First-Principles Phonon Lifetimes via Inelastic Neutron Scattering
Enda Xiao, Hao Ma, Matthew S. Bryan +10
Phonon lifetimes are a key component of quasiparticle theories of transport, yet first-principles lifetimes are rarely directly compared to inelastic neutron scattering (INS) resul…
Dynamic crystallography reveals spontaneous anisotropy in cubic GeTe
Simon A. J. Kimber, Jiayong Zhang, Charles H. Liang +10
Cubic energy materials such as thermoelectrics or hybrid perovskite materials are often understood to be highly disordered. In GeTe and related IV-VI compounds, this is thought to…
Frustration-induced diffusive scattering anomaly and dimension change in
Yaokun Su, Hillary L. Smith, Matthew B. Stone +4
Magnetic frustration, arising from the competition of exchange interactions, has received great attention because of its relevance to exotic quantum phenomena in materials. In the…
Matryoshka Phonon Twinning in alpha-GaN
Bin Wei, Qingan Cai, Qiyang Sun +5
Understanding lattice dynamics is crucial for effective thermal management in high-power electronic devices because phonons dominate thermal transport in most semiconductors. This…