38 citations · 166 across the 13 of their papers we have counts for
13 papers
Roughness-induced magnetic decoupling at organic-inorganic interface
Hiroki Ono, Yoshitaka Umeda, Kaito Yoshida +8
We have investigated structural, electronic and magnetic properties of HPc on FeN/Fe using low-energy electron diffraction and soft x-ray absorption spectroscopy/x-ray magn…
Photo-induced Antiferromagnetic-ferromagnetic Transition and Electronic Structure Modulation in GdBaCoO Thin Film
Yujun Zhang, Tsukasa Katayama, Akira Chikamatsu +9
We investigate both the ferromagnetic (FM) and antiferromagnetic (AFM) ultrafast dynamics of a strongly correlated oxide system, GdBaCoO thin film, by time-resolved x-r…
Photoinduced Transient States of Antiferromagnetic Orderings in LaSrFeO and SrFeO Thin Films Observed through Time-resolved Resonant Soft X-ray Scattering
Kohei Yamamoto, Tomoyuki Tsuyama, Suguru Ito +12
The relationship between the magnetic interaction and photoinduced dynamics in antiferromagnetic perovskites is investigated in this study. In LaSrFeO t…
Soft X-ray Vortex Beam detected by In-line Holography
Yuta Ishii, Kohei Yamamoto, Yuichi Yokoyama +4
We demonstrate the in-line holography for soft x-ray vortex beam having an orbital angular momentum. A hologram is recorded as an interference between a Bragg diffraction wave from…
Spin-orbital liquid in BaCuSbO stabilized by oxygen holes
Kou Takubo, Takashi Mizokawa, Huiyuan Man +7
Both the Jahn-Teller distortion of CuO octahedra and magnetic ordering are absent in hexagonal BaCuSbO suggesting a Cu 3 spin-orbital liquid state. Here,…
Interfacial-hybridization-modified Ir Ferromagnetism and Electronic Structure in LaMnO/SrIrO Superlattices
Yujun Zhang, Yong Zheng Luo, Liang Wu +19
Artificially fabricated 3/5 superlattices (SLs) involve both strong electron correlation and spin-orbit coupling in one material by means of interfacial 3-5 coupling, w…
Hard and soft x-ray photoemission spectroscopy study of the new Kondo system SmO thin film
Shoya Sakamoto, Kenichi Kaminaga, Daichi Oka +15
SmO thin film is a new Kondo system showing a resistivity upturn around 10 K and was theoretically proposed to have a topologically nontrivial band structure. We have performed har…
Element-selective tracking ultrafast demagnetization process in Co/Pt multilayer thin films by the resonant magneto-optical Kerr effect
Kohei Yamamoto, Souliman El Moussaoui, Yasuyuki Hirata +8
We examined the photo-induced dynamics of ferromagnetic Co/Pt thin films demonstrating perpendicular magnetic anisotropy with element specificity using resonant polar magneto-optic…
Design and experimental demonstration of a laser modulation system for future gravitational-wave detectors
Kohei Yamamoto, Keiko Kokeyama, Yuta Michimura +12
Detuning the signal-recycling cavity length from a cavity resonance significantly improves the quantum noise beyond the standard quantum limit, while there is no km-scale gravitati…
Nature of carrier doping in T'-La1.8-xEu0.2SrxCuO4 studied by X-Ray Photoemission and Absorption Spectroscopy
Chun Lin, Masafumi Horio, Takayuki Kawamata +15
Recently, hole-doped superconducting cuprates with the T'-structure La1.8-xEu0.2SrxCuO4 (LESCO) have attracted a lot of attention. We have performed x-ray photoemission and absorpt…
Ultrafast demagnetization of Pt magnetic moment in L1-FePt probed by hard x-ray free electron laser
Kohei Yamamoto, Yuya Kubota, Motohiro Suzuki +15
We demonstrate ultrafast magnetization dynamics in a 5d transition metal using circularly-polarized x-ray free electron laser in the hard x-ray region. A decay time of light-induce…
Capturing ultrafast magnetic dynamics by time-resolved soft x-ray magnetic circular dichroism
Kou Takubo, Kohei Yamamoto, Yasuyuki Hirata +9
Experiments of time-resolved x-ray magnetic circular dichroism (Tr-XMCD) and resonant x-ray scattering at a beamline BL07LSU in SPring-8 with a time-resolution of under 50 ps are p…
Interference of the Bloch phase in layered materials with stacking shifts
Ryosuke Akashi, Yo Iida, Kohei Yamamoto +1
In periodic systems, electronic wave functions of the eigenstates exhibit the periodically modulated Bloch phases and are characterized by their wave numbers . We theoreti…