38 citations · 397 across the 30 of their papers we have counts for
30 papers
Measurement of emission spectrum for gaseous argon electroluminescence in visible light region from 300 to 600 nm
Kazutaka Aoyama, Masato Kimura, Hiroyuki Morohoshi +3
A double-phase Ar detector can efficiently identify particles and reconstruct their positions. However, the properties of electroluminescence (EL) for secondary light emission in t…
Development of a high-light-yield liquid argon detector using tetraphenyl butadiene and silicon photomultiplier array
Kazutaka Aoyama, Masashi Tanaka, Masato Kimura +1
To increase the light yield of a liquid Ar (LAr) detector, we optimized the evaporation technique of tetraphenyl butadiene (TPB) on the detector surface and tested the operability…
Soft x-ray irradiation induced metallization of layered TiNCl
Noriyuki Kataoka, Masashi Tanaka, Wataru Hosoda +5
We have performed soft x-ray spectroscopy in order to study the photoirradiation time dependence of the valence band structure and chemical states of layered transition metal nitri…
Measurement of ambient neutrons in an underground laboratory at Kamioka Observatory and future plan
Keita Mizukoshi, Ryosuke Taishaku, Keishi Hosokawa +7
Ambient neutrons are one of the most serious backgrounds for underground experiments in search of rare events. The ambient neutron flux in an underground laboratory of Kamioka Obse…
μ-PES Studies on TiNCl and Quasi-two-dimensional Superconductor Na-intercalated TiNCl
Noriyuki Kataoka, Kensei Terashima, Masashi Tanaka +5
Electron-doped TiNCl is a superconductor, for which exotic mechanisms of the superconductivity have been discussed. However, difficulty in preparing large single-phase samples has…
Growth and physical properties of Ce(O,F)Sb(S,Se)2 single crystals with site-selected chalcogen atoms
Masanori Nagao, Masashi Tanaka, Akira Miura +6
Ce(O,F)Sb(S,Se)2 single crystals were successfully grown using a CsCl/KCl flux method. The obtained crystals have a plate-like shape with the typical size of 1-2 mm and well-develo…
Measurement of ambient neutrons in an underground laboratory at Kamioka Observatory
Keita Mizukoshi, Ryosuke Taishaku, Keishi Hosokawa +8
Ambient neutrons are one of the most serious backgrounds for underground experiments searching for rare events. The ambient neutron flux in an underground laboratory of Kamioka Obs…
Observation of Zero Resistance in As-Electrodeposited FeSe
Aichi Yamashita, Ryo Matsumoto, Masashi Tanaka +5
Superconducting FeSe films were electrochemically deposited on rolling-assisted biaxially textured substrate (RABiTS) tape. We observed zero resistivity in the as-electrodeposited…
Electronic Transport Properties of Carrier Controlled SnSe Single Crystals
Aichi Yamashita, Osamu Ogiso, Ryo Matsumoto +6
We found that the electronic transport property of SnSe single crystals was sensitive to oxygen content. Semiconducting SnSe single crystals were obtained by using Sn of grain form…
Quenching Dependence on Superconductivity in the Synthesizing Process of Single Crystals of RbFeSe
Masashi Tanaka, Hiroyuki Takeya, Yoshihiko Takano
Superconducting single crystals of Rb-intercalated FeSe compounds RbFeSe were prepared by using a starting material of RbSe as a Rb source. The superconducting…
Superconductivity and its Enhancement under High Pressure in "F-free" Single Crystals of CeOBiS
Masashi Tanaka, Masanori Nagao, Ryo Matsumoto +6
"F-free" CeOBiS single crystals have successfully grown, thoroughly eliminating a concern about F-contamination by using a high-purity CsCl flux. The obtained crystals have a p…
Growth and superconducting properties of Cd-doped La(O,F)BiS2 single crystals
Masanori Nagao, Masashi Tanaka, Satoshi Watauchi +2
Cd-doped La(O,F)BiS2 single crystals were grown using a CsCl/KCl flux. The grown crystals have a plate-like shape with ~1-2 mm square size in a well-developed ab-plane. The Cd dopi…
Phase Diagram of FeSe Deposited by Electrochemical Technique with Different Temperature and Voltage
Aichi Yamashita, Masashi Tanaka, Hiroyuki Takeya +1
High-quality crystalline FeSe is successfully synthesized in 5 minutes by an electrochemical deposition technique via increasing the solution temperature. The synthesis of FeSe hav…
Phase-separation control of KFeSe superconductor through rapid-quenching process
Yusuke Yanagisawa, Masashi Tanaka, Aichi Yamashita +5
KFeSe exhibits an iron-vacancy ordering at C and separates into two phases: a minor superconducting (iron-vacancy-disordered) phase and a majo…
Direct Observation of Microstructures on Superconducting Single Crystals of KFeSe
Masashi Tanaka, Hiroyuki Takeya, Yoshihiko Takano
Potassium intercalated FeSe has been reported as a superconductor with superconducting transition temperatures ('s) of 30-48 K. However, there is no clear answer to iden…
Observation of a Hidden Hole-Like Band Approaching the Fermi Level in K-Doped Iron Selenide Superconductor
Masanori Sunagawa, Kensei Terashima, Takahiro Hamada +16
One of the ultimate goals of the study of iron-based superconductors is to identify the common feature that produces the high critical temperature (Tc). In the early days, based on…
Spin-induced anomalous magnetoresistance at the (100) surface of hydrogen-terminated diamond
Yamaguchi Takahide, Yosuke Sasama, Masashi Tanaka +4
We report magnetoresistance measurements of hydrogen-terminated (100)-oriented diamond surfaces where hole carriers are accumulated using an ionic-liquid-gated field-effect-transis…
Origin of Pressure-induced Superconducting Phase in KFeSe studied by Synchrotron X-ray Diffraction and Spectroscopy
Yoshiya Yamamoto, Hitoshi Yamaoka, Masashi Tanaka +12
Pressure dependence of the electronic and crystal structures of KFeSe, which has pressure-induced two superconducting domes of SC I and SC II, was investigated…
Anisotropic superconductivity in La(O,F)BiSeS crystals revealed by field-angle dependent Andreev reflection spectroscopy
Mohammad Aslam, Sirshendu Gayen, Avtar Singh +4
From field-angle dependent Andreev reflection spectroscopy on single crystals of La(O,F)BiSeS, which belongs to the recently discovered BiCh 2 (Ch = S, Se) based layered supercondu…
Origin of the Higher-$T_\rm{c}$ Phase in the KFeSe System
Masashi Tanaka, Yusuke Yanagisawa, Masaya Fujioka +7
Single crystals of KFeSe are prepared by quenching at various temperatures. The crystals obtained at higher quenching temperatures have a surface morphology with me…
Electrochemical deposition of FeSe on RABiTS tapes
Satoshi Demura, Masashi Tanaka, Aichi Yamashita +9
FeSe film is successfully fabricated onto Rolling Assisted Biaxially Textured Substrate (RABiTS) tapes by an electrochemical deposition technique. The deposited FeSe films tend to…
Site Selectivity on Chalcogen Atoms in Superconducting La(O,F)BiSSe
Masashi Tanaka, Takuma Yamaki, Yoshitaka Matsushita +5
Single crystals of La(O,F)BiSSe were successfully grown by a CsCl flux method. Single crystal X-ray structural analysis revealed that the crystal structure is isostructural with Bi…
Pressure-induced phase transition for single crystalline LaO0.5F0.5BiSe2
Masaya Fujioka, Masashi Tanaka, Saleem J. Denholme +4
We have demonstrated a pressure-induced phase transition from a low-Tc phase to a high-Tc phase in a single crystal of the superconductor LaO0.5F0.5BiSe2. The high-Tc phase appears…
High-Tc Phase of PrO0.5F0.5BiS2 single crystal induced by uniaxial pressure
Masaya Fujioka, Masanori Nagao, Saleem J. Denholme +4
We demonstrated a pressure-induced phase transition from a low-Tc phase (3.5 K) to a high-Tc phase (8.7 K) in single crystalline PrO0.5F0.5BiS2. The high-Tc phase is easily observe…