We review oxygen K-edge X-ray absorption spectra of both molecules and solids. We start
with an overview of the main experimental aspects of oxygen K-edge X-ray absorption …

Abstract β-Ga 2 O 3 is an emerging, ultra-wide bandgap (energy gap of 4.85 eV) transparent
semiconducting oxide, which attracted recently much scientific and technological attention …

Wide-bandgap semiconductors (WBG) are expected to be applied to solid-state lighting and
power devices, supporting a future energy-saving society. Here we present evidence of p …

A review is given of reported trap states in the bandgaps of different polymorphs of the
emerging ultrawide bandgap semiconductor Ga 2 O 3. The commonly observed defect …

As an ultrawide bandgap semiconductor, gallium oxide (Ga 2 O 3) has superior physical
properties and has been an emerging candidate in the applications of power electronics and …

Abstract The Bethe–Salpeter equation for the electron–hole correlation function is the state-
of-the-art formalism for optical and core spectroscopy in condensed matter. Solutions of this …

The development of novel materials for vacuum electron sources in particle accelerators is
an active field of research that can greatly benefit from the results of ab initio calculations for …

The search for new wide-band-gap materials is intensifying to satisfy the need for more
advanced and energy-efficient power electronic devices. Ga2O3 has emerged as an …

Zero-strain electrodes, such as spinel lithium titanate (Li4/3Ti5/3O4), are appealing for
application in batteries due to their negligible volume change and extraordinary stability …

We present an ab initio study of core excitations of solid-state materials focusing on the role
of electron-hole correlation. In the framework of an all-electron implementation of many-body …