6 papers
Experimentally Mapping the Phase Diagrams of Photoexcited Small Polarons
Jocelyn L. Mendes, Scott K. Cushing
Understanding the fundamental properties that dictate photoexcited polarons in materials is critical to tuning their properties. Theoretical models of polarons have only recently b…
The Role of THz Phonons in the Ionic Conduction Mechanism of Polymorphs
Amy K. Lin, Natan A. Spear, Geoffrey A. Blake +1
Superionic conduction in solid-state materials is governed not only by static factors, such as structure and composition, but also by dynamic interactions between the mobile ion an…
Correlated Terahertz phonon-ion interactions control ion conduction in a solid electrolyte
Kim H. Pham, Kiarash Gordiz, Natan A. Spear +9
Ionic conduction in solids that exceeds 1 mS/cm is predicted to involve coupled phonon-ion interactions in the crystal lattice. Here, we use theory and experiment to measure the po…
Coherent and Dynamic Small Polaron Delocalization in CuFeO
Jocelyn L. Mendes, Srijan Bhattacharyya, Chengye Huang +10
Small polarons remain a significant bottleneck in the realization of efficient devices using transition metal oxides. Routes to engineer small polaron coupling to electronic states…
Dynamic Competition Between Hubbard and Superexchange Interactions Selectively Localizes Electrons and Holes Through Polarons
Jocelyn L. Mendes, Hyun Jun Shin, Jae Yeon Seo +4
Controlling the effects of photoexcited polarons in transition metal oxides can enable the long timescale charge separation necessary for renewable energy applications as well as c…
The dynamical role of optical phonons and sub-lattice screening in a solid-state ion conductor
Kim H. Pham, Vijaya Begum-Hudde, Amy K. Lin +6
Solid-state electrolytes (SSEs) require ionic conductivities that are competitive with liquid electrolytes to realize applications in all-solid state batteries. Although numerous m…