529 citations · 830 across the 12 of their papers we have counts for
12 papers
Groove-shaped defects in as-grown (001)-oriented -GaO epilayers prepared by halide vapor phase epitaxy
Yongzhao Yao, Daiki Katsube, Hirotaka Yamaguchi +1
Groove-shaped defects (GSDs) degrade the surface flatness of as-grown (001)-oriented -GaO epilayers and necessitate chemical mechanical polishing before device fabricati…
Dislocations in (011)-oriented vertical Bridgman -GaO substrates
Yongzhao Yao, Daiki Katsube, Hirotaka Yamaguchi +1
Dislocation in (011)-oriented -GaO substrates grown by the vertical Bridgman method was investigated using X-ray topography (XRT), combined with X-ray reticulography. Tr…
Three-dimensional visualization of lattice defects in -GaO via synchrotron-radiation Borrmann-effect X-ray topo-tomography
Yongzhao Yao, Daiki Katsube, Hirotaka Yamaguchi +4
beta-Ga2O3 is a promising material for next-generation power electronics; however, its performance is strongly affected by lattice defects such as dislocations. In this study, we d…
Highly dispersive magnons with spin-gap like features in the frustrated ferromagnetic S=1/2 chain compound Ca2Y2Cu5O10 detected by inelastic neutron scattering
M. Matsuda, J. Ma, V. O. Garlea +10
We report inelastic neutron scattering experiments in Ca2Y2Cu5O10 and map out the full one magnon dispersion which extends up to a record value of 53 meV for frustrated ferromagnet…
Comment on `Oxygen vacancy-induced magnetic moment in edge-sharing CuO chains of LiCuO'
R. O. Kuzian, R. Klingeler, W. E. A. Lorenz +23
In a recent work devoted to the magnetism of LiCuO, Shu et al. [New J. Phys. 19 (2017) 023026] have proposed a "simplified" unfrustrated microscopic model that differs…
Ca2Y2Cu5O10: the first frustrated quasi-1D ferromagnet close to criticality
R. O. Kuzian, S. Nishimoto, S. -L. Drechsler +9
Ca2Y2Cu5O10 is build up from edge-shared CuO4 plaquettes forming spin chains. From inelastic neutron scattering data we extract an in-chain nearest neighbor exchange J1 approximate…
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…
Superconductivity at high Tc in neodymium-doped 1111-SrFeAsF system
S. V. Chong, T. Goya, H. Yamaguchi +1
Polycrystalline Sr1-xNdxFeAsF samples were prepared at various Nd-doping levels using both a stoichiometric mixture of the starting materials and in slight excess amounts of FeAs.…
Resonant inelastic x-ray scattering study of the electronic structure of CuO
Young-June Kim, J. P. Hill, H. Yamaguchi +2
A resonant inelastic x-ray scattering study of the electronic structure of the semiconductor cuprous oxide, , is reported. When the incident x-ray energy is tuned to the…
Effects of hole-doping on the magnetic ground state and excitations in the edge-sharing CuO chains of CaYCuO
M. Matsuda, K. Kakurai, S. Kurogi +5
Neutron scattering experiments were performed on the undoped and hole-doped CaYCuO, which consists of ferromagnetic edge-sharing CuO chains. It was p…
Angular Position of Nodes in the Superconducting Gap of Quasi-2D Heavy-Fermion Superconductor CeCoIn_5
K. Izawa, H. Yamaguchi, Yuji Matsuda +3
The thermal conductivity of the heavy-fermion superconductor CeCoIn_5 has been studied in a magnetic field rotating within the 2D planes. A clear fourfold symmetry of the thermal c…
Superconducting Gap Structure of Spin-Triplet Superconductor Sr_2RuO_4 Studied by Thermal Conductivity
K. Izawa, H. Takahashi, H. Yamaguchi +7
To clarify the superconducting gap structure of the spin-triplet superconductor Sr_2RuO_4, the in-plane thermal conductivity has been measured as a function of relative orientation…