Recent progress in utilizing ultrafast light-matter interaction to control the macroscopic
properties of quantum materials is reviewed. Particular emphasis is placed on photoinduced …

This work reviews the experimental studies on photo-induced cooperative phenomena
(photo-induced phase transitions, PIPT), which are related to ultrafast structural and …

Understanding microscopic processes in materials and devices that can be switched by light
requires experimental access to dynamics on nanometer length and femtosecond time …

Using density functional theory calculations, we investigate the origin of the insulating phase
and metal-insulator transition (MIT) in octahedral tantalum disulfide (1 T-TaS 2), a layered …

Using light to control transient phases in quantum materials is an emerging route to
engineer new properties and functionality, with both thermal and non-thermal phases …

Understanding Mott insulators and charge density waves (CDW) is critical for both
fundamental physics and future device applications. However, the relationship between …

We introduce ultrafast low-energy electron diffraction (ULEED) in backscattering for the
study of structural dynamics at surfaces. Using a tip-based source of ultrashort electron …

Domain walls (DWs) are singularities in an ordered medium that often host exotic
phenomena such as charge ordering, insulator-metal transition, or superconductivity. The …

The tunability of materials properties by light promises a wealth of future applications in
energy conversion and information technology. Strongly correlated materials such as …

Topological defects play a central role in dynamical systems undergoing a non-adiabatic
transition. In solids, topological defects as a result of femtosecond laser excitation have …