130 citations · 544 across the 17 of their papers we have counts for
17 papers
Indirect Excitons and Many-body Interactions in InGaAs Double Quantum Wells
Christopher L. Smallwood, Rachel Owen, Matthew W. Day +6
Spatially indirect excitons in semiconductor quantum wells are relevant to basic research and device applications because they exhibit enhanced tunability, delocalized wave functio…
Ultrafast Control of Crystal Structure in a Topological Charge-Density-Wave Material
Takeshi Suzuki, Yuya Kubota, Natsuki Mitsuishi +15
Optical control of crystal structures is a promising route to change physical properties including topological nature of a targeting material. Time-resolved X-ray diffraction measu…
Nodeless electron pairing in CsVSb-derived kagome superconductors
Yigui Zhong, Jinjin Liu, Xianxin Wu +19
The newly discovered kagome superconductors represent a promising platform for investigating the interplay between band topology, electronic order, and lattice geometry. Despite ex…
Photo-induced nonlinear band shift and valence transition in SmS
Yitong Chen, Takuto Nakamura, Hiroshi Watanabe +12
The photo-induced band structure variation of a rare-earth-based semiconductor, samarium monosulfide (SmS), was investigated using high-harmonic-generation laser-based time-resolve…
Phase-resolved frequency-domain analysis of the photoemission spectra for photoexcited 1T-TaS2 in the Mott insulating charge density wave state
Q. -H. Ren, T. Suzuki, T. Kanai +3
We investigate the nonequilibrium electronic structure of 1T-TaS2 by time- and angle-resolved photoemission spectroscopy. We observe that strong photoexcitation induces the collaps…
Direct observation of multiple conduction-band minima in high-performance thermoelectric SnSe
Mario Okawa, Yuka Akabane, Mizuki Maeda +14
We report time- and angle-resolved photoemission spectroscopy on SnSe which currently attracts great interest due to its extremely high thermoelectric performance. Laser-assisted p…
HHG-laser-based time- and angle-resolved photoemission spectroscopy of quantum materials
Takeshi Suzuki, Shik Shin, Kozo Okazaki
Time- and angle-resolved photoemission spectroscopy has played an important role in revealing the non-equilibrium electronic structures of solid-state materials. The implementation…
Photo-excitation band-structure engineering of 2H-NbSe probed by time- and angle-resolved photoemission spectroscopy
Mari Watanabe, Takeshi Suzuki, Takashi Someya +8
We investigated the nonequilibrium electronic structure of 2H-NbSe by time- and angle-resolved photoemission spectroscopy. We find that the band structure is distinctively modu…
Detecting electron-phonon couplings during photo-induced phase transition
Takeshi Suzuki, Yasushi Shinohara, Yangfan Lu +13
Photo-induced phase transitions have been intensively studied owing to the ability to control a material of interest in the ultrafast manner, which can induce exotic phases unable…
Symmetry-breaking and spin-blockage effects on carrier dynamics in single-layer tungsten diselenide
Ro-Ya Liu, Meng-Kai Lin, Peng Chen +10
Understanding carrier creation and evolution in materials initiated by pulsed optical excitation is central to developing ultrafast optoelectronics. We demonstrate herein that the…
Photo-induced Superconducting State with Long-lived Disproportionate Band Filling in FeSe
Takeshi Suzuki, Takashi Someya, Takahiro Hashimoto +11
Photo-excitation is a very powerful way to instantaneously drive a material into a novel quantum state without any fabrication, and variable ultrafast techniques have been develope…
Ultrafast unbalanced electron distributions in quasicrystalline 30° twisted bilayer graphene
T. Suzuki, T. Iimori, S. J. Ahn +15
Layers of twisted bilayer graphene exhibit varieties of exotic quantum phenomena1-5. Today, the twist angle Θ has become an important degree of freedom for exploring novel states o…
Photo-induced semimetallic states realised in electron-hole coupled insulators
Kozo Okazaki, Yu Ogawa, Takeshi Suzuki +15
Using light to manipulate materials into desired states is one of the goals in condensed matter physics, since light control can provide ultrafast and environmentally-friendly phot…
Dephasing of InAs quantum dot p-shell excitons using two-dimensional coherent spectroscopy
Takeshi Suzuki, Rohan Singh, Galan Moody +5
The dephasing mechanisms of p-shell and s-shell excitons in an InAs self-assembled quantum dot ensemble are examined using two-dimensional coherent spectroscopy (2DCS). 2DCS provid…
Antiphase Fermi-surface modulations accompanying displacement excitation in a parent compound of iron-based superconductors
Kozo Okazaki, Hakuto Suzuki, Takeshi Suzuki +12
We investigate the transient electronic structure of BaFe2As2, a parent compound of iron-based superconductors, by time- and angle-resolved photoemission spectroscopy. In order to…
Exciton Mott transition in Si Revealed by Terahertz Spectroscopy
Takeshi Suzuki, Ryo Shimano
Exciton Mott transition in Si is investigated by using terahertz time-domain spectroscopy. The excitonic correlation as manifested by the 1s-2p resonance is observed above the Mott…
Cooling Dynamics of Photoexcited Carriers in Si Studied by Using Optical Pump and Terahertz Probe Spectroscopy
Takeshi Suzuki, Ryo Shimano
We investigated the photoexcited carrier dynamics in Si by using optical pump and terahertz probe spectroscopy in an energy range between 2 meV and 25 meV. The formation dynamics o…