We performed in situ angle-resolved photoemission spectroscopy (ARPES) and spin-
resolved ARPES (SARPES) experiments to investigate the relationship between electronic …

Piezocatalytic water splitting is an emerging approach for generating green hydrogen by
using noise. However, while the efficiency of hydrogen production remains limited, barely …

Divergent density of states (DOS) can induce extraordinary phenomena such as significant
enhancement of superconductivity and unexpected phase transitions. Moreover, van Hove …

The oxygen evolution reaction (OER) from water requires the formation of metastable,
reactive oxygen intermediates to enable oxygen–oxygen bond formation. Conversely, such …

Doped Mott insulators are the starting point for interesting physics such as high temperature
superconductivity and quantum spin liquids. For multi-band Mott insulators, orbital selective …

A series of single crystal Sr 2 Ir 1–x Ru x O 4 (0≤ x≤ 0.55) have been synthesized, and their
physical properties have been investigated. Ru-substitution at Ir-site can drastically reduce …

We have investigated the structural, electronic and magnetic properties of the Mott insulator
Ca2RuO4 under the application of a static external electric field in two regimes: bulk systems …

In this study, we employ first-principle calculations and the full-potential linearized
augmented plane-wave (FLAPW) method to systematically investigate the impact of A-site …

The field of ultrathin film is an emerging area of oxide materials research. In the works in this
thesis, we study emergent phenomena within ultrathin film systems of ruthenate and iridate …

2 Experiment High-quality single crystals of Ca3Ru2O7 were grown by the floating zone
technique. XPS measurements were performed at BL2A of Photon Factory at T= 20 K with …