Angle-resolved photoemission spectroscopy (ARPES), with its exceptional sensitivity to both
the binding energy and the momentum of valence electrons in solids, provides unparalleled …

In the last decade, there has been a proliferation of laser sources for time-and angle-
resolved photoemission spectroscopy (TR-ARPES), building on the proven capability of this …

Exotic phenomena can be achieved in quantum materials by confining electronic states into
two dimensions. For example, relativistic fermions are realized in a single layer of carbon …

Superconductivity often emerges as a dome around a quantum critical point (QCP) where
long-range order is suppressed to zero temperature, mostly in magnetically ordered …

1 T-TaSe 2 is widely believed to host a Mott metal-insulator transition in the charge density
wave (CDW) phase according to the spectroscopic observation of a band gap that extends …

Femtosecond core-level transient absorption spectroscopy is utilized to investigate
photoinduced dynamics of the charge density wave in 1 T-TiSe 2 at the Ti M 2, 3 edge (32 …

Spontaneous condensation of excitons is a long-sought phenomenon analogous to the
condensation of Cooper pairs in a superconductor. It is expected to occur in a …

The coupling of the electron system to lattice vibrations and their time-dependent control and
detection provide unique insight into the nonequilibrium physics of semiconductors. Here …

The ultrafast electronic structures of the charge density wave material 1 T-TiSe 2 were
investigated by high-resolution time-and angle-resolved photoemission spectroscopy. We …

We investigate the nonequilibrium electronic structure and characteristic timescales in a
candidate excitonic insulator, Ta 2 Ni Se 5, using time-and angle-resolved photoemission …