The physics of quantum materials is dictated by many-body interactions and mathematical
concepts such as symmetry and topology that have transformed our understanding of matter …

Angle-resolved photoemission spectroscopy (ARPES)—an experimental technique based
on the photoelectric effect—is arguably the most powerful method for probing the electronic …

Solar cells based on perovskite-halide light absorbers have a unique set of characteristics
that could help alleviate the global dependence on fossil fuels for energy generation. They …

Since the first demonstration of the generation of attosecond pulses (1 as= 10− 18 s) in the
extreme-ultraviolet spectral region, several measurement techniques have been introduced …

High-harmonic generation (HHG) traditionally combines~ 100 near-infrared laser photons to
generate bright, phase-matched, extreme ultraviolet beams when the emission from many …

Successfully designing an ideal solar cell requires an understanding of the fundamental
physics of photoexcited hot carriers (HCs) and the underlying mechanism of unique …

Intense ultrashort light pulses comprising merely a few wave cycles became routinely
available by the turn of the millennium. The technologies underlying their production and …

Comprehensive knowledge of the dynamic behaviour of electrons in condensed-matter
systems is pertinent to the development of many modern technologies, such as …

Surface science has evolved from being a sub-field of chemistry or physics, and has now
established itself as an interdisciplinary topic. Knowledge has developed sufficiently that we …

Using femtosecond time-and angle-resolved photoemission spectroscopy, we investigated
the nonequilibrium dynamics of the topological insulator Bi 2 Se 3. We studied p-type Bi 2 …