Greta L. Chappell

collaborators

3 papers

cond-mat.str-el2025

Large Kohn anomaly and phonon collapse induced by charge density wave in UPt $_{2}$ Si $_{2}$

Jooseop Lee, Greta L. Chappell, Ryan E. Baumbach +2

Using high-energy-resolution inelastic x-ray scattering, we observe anomalous softening and damping of the transverse acoustic phonon in UPt $_{2}$ Si $_{2}$ as the system is cooled towar…

cond-mat.mtrl-sci2025

Adaptation of Wallace's Approach to the Specific Heat of Elemental Solids with Significant Intrinsic Anharmonicity, Particularly the Light Actinide Metals

Christopher A. Mizzi, W. Adam Phelan, Matthew S. Cook +6

The quasiharmonic approximation is the most common method for modeling the specific heat of solids; however, it fails to capture the effects of intrinsic anharmonicity. In this stu…

cond-mat.mtrl-sci2024

A noncollinear density functional theory ansatz for the phononic and thermodynamic properties of $I^\pm$ -Pu

Alexander R. MuÃ±oz, W. Adam Phelan, Matthew S. Cook +6

Plutonium's phase diagram is host to complex structures and interactions that make the description of its ground state properties elusive. Using all-electron density functional the…

Large Kohn anomaly and phonon collapse induced by charge density wave in UPt2​Si2​

Adaptation of Wallace's Approach to the Specific Heat of Elemental Solids with Significant Intrinsic Anharmonicity, Particularly the Light Actinide Metals

A noncollinear density functional theory ansatz for the phononic and thermodynamic properties of I^±-Pu

Large Kohn anomaly and phonon collapse induced by charge density wave in UPt $_{2}$ Si $_{2}$

A noncollinear density functional theory ansatz for the phononic and thermodynamic properties of $I^\pm$ -Pu