2 papers
cond-mat.mtrl-sci2025
Large phonon-drag thermopower polarity reversal in Ba-doped KTaO3
Mohamed Nawwar, Samuel Poage, Tobias Schwaigert +6
This study reports the observation of phonon-drag thermopower polarity reversal in Ba-doped KTaO3 thin films, mediated by electron-phonon Umklapp scattering. Epitaxial films with d…
cond-mat.mtrl-sci2025
Electric field dependent thermal conductivity of relaxor ferroelectric PMN-33PT through changes in the phonon spectrum
Delaram Rashadfar, Brandi L. Wooten, Joseph P. Heremans
In ferroelectric materials, an electric field has been shown to change the phonon dispersion sufficiently to alter the lattice thermal conductivity, opening the possibility that a…