5 papers
Ultrafast Spontaneous Exciton Dissociation via Phonon Emission in BiVO
Stephen E. Gant, Antonios M. Alvertis, Christopher J. N. Coveney +3
Monoclinic bismuth vanadate (m-BiVO) is a promising indirect band gap semiconductor for photoelectrochemical water splitting, yet the characteristics of its low-lying photoexci…
Theory of ab initio downfolding with arbitrary range electron-phonon coupling
Norm M. Tubman, Christopher J. N. Coveney, Chih-En Hsu +6
Ab initio downfolding describes the electronic structure of materials within a low-energy subspace, often around the Fermi level. Typically starting from mean-field calculations, t…
Phonon-mediated electron attraction in SrTiO via the generalized Fröhlich and deformation potential mechanisms
Christopher J. N. Coveney, Norm M. Tubman, Chih-En Hsu +6
Superconductivity in doped SrTiO was discovered in 1964, the first superconducting transition observed in a doped semiconductor. However, the mechanism of electron pairing in S…
Phonon screening of excitons in atomically thin semiconductors
Woncheol Lee, Antonios M. Alvertis, Zhenglu Li +4
Atomically thin semiconductors, encompassing both 2D materials and quantum wells, exhibit a pronounced enhancement of excitonic effects due to geometric confinement. Consequently,…
Rearrangement collision theory of phonon-driven exciton dissociation
Christopher J. N. Coveney, Jonah B. Haber, Antonios M. Alvertis +2
Understanding the processes governing the dissociation of excitons to free charge carriers in semiconductors and insulators is of central importance for photovoltaic applications.…