3 papers
cond-mat.mtrl-sci2025
Band gap tuning by structural phase transition in Sm-substituted BiFeO3 powders
Christina Hill, Michele Melchiorre, Cosme Milesi-Brault +6
The substitution of bismuth by samarium in BiFeO3 is known to induce a structural phase transition from the polar phase to a non-polar phase, with a possible antiferroelectric inte…
cond-mat.mtrl-sci2024
Raman resonances mediated by excitonic polarons in BiVO
Georgy Gordeev, Christina Hill, Angelina Gudima +2
Excitonic polarons are quasiparticles formed by a Coulomb-bound electron-hole pair with strong coupling to lattice vibrations. Despite high fundamental interest in excitonic polaro…
cond-mat.mtrl-sci2023
Phonon-phonon coupling in bismuth vanadate over a large temperature range across the monoclinic phase
Christina Hill, Georgy Gordeev, Mael Guennou
In this work we study phonon-phonon coupling in bismuth vanadate (BiVO4), known for its second-order transition involving a variety of coupling mechanisms. Using Raman spectroscopy…