47 citations · 111 across the 9 of their papers we have counts for
9 papers
Anisotropic Optical Conductivity Accompanied by a Small Energy Gap in One-Dimensional Thermoelectric Telluride Ta4SiTe4
Fumiya Matsunaga, Yoshihiko Okamoto, Yasunori Yokoyama +7
We investigated the optical properties of single crystals of one-dimensional telluride Ta4SiTe4, which shows high thermoelectric performance below room temperature. Optical conduct…
Regular-Triangle Trimer and Charge Order Preserving the Anderson Condition in the Pyrochlore Structure of CsWO
Yoshihiko Okamoto, Haruki Amano, Naoyuki Katayama +14
Since the discovery of the Verwey transition in magnetite, transition metal compounds with pyrochlore structures have been intensively studied as a platform for realizing remarkabl…
Inversion-induced orbital and exchange disorders in antiferromagnetic A-site spinel CoAl2O4
Takashi Naka, Hiroaki Mamiya, Kanji Takehana +6
The inversion and volume effects on magnetism in a spinel-type magnetically frustrated compound, CoAl2O4, and its gallium-substituted system, CoAl2-xGaxO4, were investigated. Magne…
Magnetic and Dielectric Properties in Multiferroic Cu3Mo2O9 under High Magnetic Fields
H. Kuroe, K. Aoki, R. Kino +15
The magnetic and dielectric properties under high magnetic fields are studied in the single crystal of Cu3Mo2O9. This multiferroic compound has distorted tetrahedral spin chains. T…
Cyclotron resonance and mass enhancement by electron correlation in KFeAs
Motoi Kimata, Taichi Terashima, Nobuyuki Kurita +15
Cyclotron resonance (CR) measurements for the Fe-based superconductor KFeAs are performed. One signal for CR is observed, and is attributed to the two-dimensional Fermi…
Possible Phase Transition Deep Inside the Hidden Order Phase of Ultraclean URu2Si2
H. Shishido, K. Hashimoto, T. Shibauchi +10
To elucidate the underlying nature of the hidden order (HO) state in heavy-fermion compound URu2Si2, we measure electrical transport properties of ultraclean crystals in a high fie…
Effect of charge state in nearby quantum dots on quantum Hall effect
K. Takehana, T. Takamasu, G. Kido +1
Magnetoresistance measurements have been performed on a gated two-dimensional electron system (2DES) separated by a thin barrier layer from a layer of InAs self-assembled quantum d…
Spin-phonon coupled modes in the incommensurate phases of doped CuGeO
K. Takehana, T. Takamasu, M. Hase +3
The doping effect of the folded phonon mode at 98 cm was investigated on the Si-doped CuGeO by magneto-optical measurements in far-infrared (FIR) region under high magne…
Far-Infrared Spectroscopy in Spin-Peierls Compound CuGeO_3 under High Magnetic Fields
K. Takehana, T. Takamasu, M. Hase +2
Polarized far-infrared (FIR) spectroscopic measurements and FIR magneto-optical studies were performed on the inorganic spin-Peierls compound CuGeO_3. An absorption line, which was…