535 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- SPring-8JP26 papers
- Japan Synchrotron Radiation Research InstituteJP20 papers
- RIKENJP7 papers
- The University of OsakaJP6 papers
- Institute for Materials Research, Tohoku University4 papers
- Japan Science and Technology AgencyJP4 papers
- Tohoku UniversityJP4 papers
- High Energy Accelerator Research OrganizationJP3 papers
- Kobe UniversityJP3 papers
- Kyoto UniversityJP3 papers
- National Institute for Materials ScienceJP3 papers
- European Synchrotron Radiation FacilityFR2 papers
26 papers
Commissioning of a compact multibend achromat lattice: A new 3 GeV synchrotron radiation facility
Shuhei Obara, Kota Ueshima, Takao Asaka +79
NanoTerasu, a new 3 GeV synchrotron light source in Japan, began user operation in April 2024. It provides high-brilliance soft to tender X-rays and covers a wide spectral range fr…
Dimer rattling mode induced low thermal conductivity in an excellent acoustic conductor
Ji Qi, Baojuan Dong, Zhe Zhang +19
A solid with larger sound speeds exhibits higher lattice thermal conductivity (k_{lat}). Diamond is a prominent instance where its mean sound speed is 14400 m s-1 and k_{lat} is 23…
Superfluorescence, free-induction decay, and four-wave mixing: propagation of free-electron laser pulses through a dense sample of helium ions
James R Harries, Hiroshi Iwayama, Susumu Kuma +9
We report an experimental and numerical study of the propagation of free-electron laser pulses (wavelength 24.3 nm) through helium gas. Ionisation and excitation populates the He$^…
Suppression of Vertical Oscillation and Observation of Flux Improvement during Top-up Injection at PLS-II
Y-G. Son, J. -Y. Kim, C. Mitsuda +9
This paper reports a start-to-end study of suppression of stored beam oscillation at PLS-II. We report that the fast counter-kicker implemented in PLS-II suppressed vertical oscill…
Crystal Structure of 200 K-Superconducting Phase of Sulfur Hydride System
Mari Einaga, Masafumi Sakata, Takahiro Ishikawa +6
This article reports the experimentally clarified crystal structure of a recently discovered sulfur hydride in high temperature superconducting phase which has the highest critical…
Investigation on MnGa/MgO interface for magnetic tunneling junctions
C. E. ViolBarbosa, S. Ouardi, T. Kubota +6
The MnGa Heusler compound and related alloys are the most promising materials for the realization of spin-transfer-torque switching in magneto tunneling junctions. Improved per…
Intrinsic Correlated Electronic Structure of CrO2 Revealed by Hard X-ray Photoemission Spectroscopy
M. Sperlich, C. König, G. Güntherodt +14
Bulk-sensitive hard x-ray photoemission spectroscopy (HAXPES) reveals for as-grown epitaxial films of half-metallic ferromagnetic CrO2(100) a pronounced screening feature in the Cr…
Phonon Softening and Dispersion in EuTiO3
David S. Ellis, Hiroshi Uchiyama, Satoshi Tsutsui +4
We measured phonon dispersion in single crystal EuTiO using inelastic x-ray scattering. A structural transition to an antiferrodistortive phase was found at a critical temperat…
Pressure suppression of unconventional charge-density-wave state in PrRu4P12 studied by optical conductivity
H. Okamura, N. Ohta, A. Takigawa +12
Optical conductivity s(w) of PrRu4P12 has been studied under high pressure to 14 GPa, at low temperatures to 8 K, and at photon energies 12 meV-1.1 eV. The energy gap in s(w) at am…
Soft and Isotropic Phonons in PrFeAsO_{1-y}
T. Fukuda, A. Q. R. Baron, H. Nakamura +9
Phonons in single crystals of PrFeAsO_{1-y} are investigated using high-resolution inelastic x-ray scattering and ab initio pseudopotential calculations. Extensive measurements of…
Softening of the Bond-Stretching Phonon of Ba1-xKxBiO3 at the Metal to Insulator Transition
H. Khosroabadi, S. Miyasaka, J. Kobayashi +4
The dispersion of phonons in Ba1-xKxBiO3 along the (3+q, 0, 0) direction in reciprocal space was determined for x=0, 0.30, 0.37, 0.52 using high-resolution inelastic X-ray scatteri…
Prominent 5d-orbital contribution to the conduction electrons in gold
A. Sekiyama, J. Yamaguchi, A. Higashiya +9
We have examined the valence-band electronic structures of gold and silver in the same column in the periodic table with nominally filled d orbitals by means of a recently develope…
Effect of K Doping on Phonons in Ba1-xKxFe2As2
Chul-Ho Lee, Kunihiro Kihou, Kazumasa Horigane +8
The lattice dynamics of Ba1-xKxFe2As2 (x = 0.00, 0.27) have been studied by inelastic X-ray scattering measurement at room temperature. K doping induces the softening and broadenin…
Experimental study of the decay
The E391a Collaboration, J. K. Ahn
The first dedicated search for the rare neutral-kaon decay has been carried out in the E391a experiment at the KEK 12-GeV proton synchrotron. The final upper li…
Superconducting properties of the oxygen-vacant iron oxyarsenide TbFeAsO1-x from underdoped to overdoped compositions
Y. G. Shi, S. Yu, A. A. Belik +8
A wide-range doping was achieved by a high-pressure method for TbFeAsO1-x from "under doped" to "over doped" superconducting compositions throughout the optimized superconductivity…
Perturbative Theory of Grazing-Incidence Diffuse Nuclear Resonant Scattering of Synchrotron Radiation
L. Deak, L. Bottyan, D. L. Nagy +3
Theoretical description of off-specular grazing-incidence nuclear resonant scattering of synchrotron radiation (Synchrotron Mössbauer Reflectometry, SMR) is presented. The recently…
Evidence for non-conventional pairing in NaCoOyHO
Jean-Pascal Rueff, M. Calandra, M. D'astuto +10
We report on first investigation of the lattice dynamics in the novel superconducting material NaCoO1.3HO and the non-hydrated parent compound Na$\_{0.7}…
Phonon Softening in Superconducting Diamond
M. Hoesch, T. Fukuda, T. Takenouchi +7
We observe strong softening of optical phonon modes in superconducting (Tc = 4.2 K) boron doped diamond near the Brillouin zone center using inelastic x-ray scattering from a CVD-g…
Photogenerated Carriers in SrTiO3 Probed by Mid-Infrared Absorption
H. Okamura, M. Matsubara, K. Tanaka +6
Infrared absorption spectra of SrTiO have been measured under above-band-gap photoexcitations to study the properties of photogenerated carriers, which should play important ro…
Photoinduced spin crossover in Fe-picolylamine complex: A farinfrared study on single crystals
H. Okamura, M. Matsubara, T. Nanba +7
Far-infrared spectroscopy has been performed on [Fe(2-picolylamine)3]Cl2EtOH (Fe-pic) single crystals, to probe changes in the molecular vibrations upon the photoinduced and temper…
High efficiency and low absorption Fresnel compound zone plates for hard X-ray focusing
A. Kuyumchyan, A. Isoyan, E. Shulakov +9
Circular and linear zone plates have been fabricated on the surface of silicon crystals for the energy of 8 keV by electron beam lithography and deep ion plasma etching methods. Va…
Charge dynamics in strongly correlated one-dimensional Cu-O chain systems revealed by inelastic X-ray scattering
S. Suga, S. Imada, A. Higashiya +11
We report on the Cu 1s resonant inelastic X-ray scattering (RIXS) of Cu-O one-dimensional (1D) strongly correlated insulator systems with contrasting atomic arrangements, namely ed…
Doping Dependent Changes in Nitrogen 2 States in the Diluted Magnetic Semiconductor GaCrN
T. Takeuchi, Y. Harada, T. Tokushima +10
We study the electronic structure of the recently discovered diluted magnetic semiconductor GaCrN ( = 0.01-0.10). A systematic study of the changes in the $occupie…
Softening of Cu-O bond stretching phonon in tetragonal HgBaCuO
H. Uchiyama, A. Q. R. Baron, S. Tsutsui +5
Phonons in nearly optimally doped HgBaCuO were studied by inelastic X-ray scattering. The dispersion of the low energy modes is well described by a shell model, while t…