76 citations · 168 across the 12 of their papers we have counts for
12 papers
Studies of superconductivity of Fe chalcogenides in films grown by PLD technique
Atsutaka Maeda, Tomoki Kobayashi, Fuyuki Nabeshima
Studies on Fe chalcogenide superconductor using thin films grown by the PLD technique are reviewed in terms of electronic phase diagram, properties in the normal state, properties…
Nonlinear planar Hall effect from superconducting vortex motion
Mio Hashimoto, Takako Konoike, Tomoki Kobayashi +6
We report the nonreciprocal charge transport along the longitudinal and transverse directions in the vortex flow regime of FeSe superconducting films. Clear nonreciprocal signals u…
Fabrication of oxide/FeSe multilayer films using the PLD technique
Tomoki Kobayashi, Hiroki Nakagawa, Ryo Ogawa +1
In this study, we demonstrate the successful fabrication of TiO2/FeSe/STO and TiO2/FeSe/LaAlO3 heterostructures using PLD. When the growth rates were sufficiently low, anatase TiO2…
Study on fluctuations of interface-enhanced superconductivity in ultrathin FeSe/SrTiO3 by the Nernst effect
Tomoki Kobayashi, Ryo Ogawa, Atsutaka Maeda
Ultrathin FeSe films on SrTiO3 substrate show interface-enhanced superconductivity. However, how the superconductivity is established including superconducting fluctuations remains…
Study of superconductivity of very thin films investigated by microwave complex conductivity measurements
Gaku Matsumoto, Ryo Ogawa, Koji Higasa +3
Complex conductivity measurements spanning the entire temperature range, including the vicinity of , were conducted on systematically varied FeSeTe ( = 0 - 0.5)…
Picosecond Trajectory of Two-dimensional Vortex Motion in FeSeTe Visualized by Terahertz Second Harmonic Generation
Sachiko Nakamura, Haruki Matsumoto, Hiroki Ogawa +4
We have investigated the vortex dynamics in a thin film of an iron-based superconductor FeSeTe by observing second-harmonic generation (SHG) in the THz frequency ra…
Interface superconductivity in FeSe thin films on SrTiOgrown by the PLD technique
T. Kobayashi, H. Ogawa, F. Nabeshima +1
In this study, we fabricate 5-30-nm-thick films of FeSe/STO using pulsed laser deposition (PLD). The grown films exhibit superconductivity with an onset that is mu…
Relationships between Superconductivity and Nematicity in FeSeTe () Films Studied by Complex Conductivity Measurements
H. Kurokawa, S. Nakamura, J. Zhao +7
We measured the complex conductivity, , of FeSeTe () films in the superconducting state which show a drastic increase of the superconducting transition temp…
Dynamic Evolution of Flux Distributions in a Pulse-driven Superconductor by High-speed Magneto-optical Imaging
H. Kurokawa, Y. Kinoshita, F. Nabeshima +2
The accurate understanding of flux dynamics is essential for the design and operation of superconducting circuits. The time evolution of flux-density distribution in an NbN strip b…
Effects of superconducting gap anisotropy on the flux flow resistivity in Y(Ni_{1-x}Pt_x)_2B_2C
K. Takaki, A. Koizumi, T. Hanaguri +7
The microwave complex surface impedance Z_s of Y(Ni_{1-x}Pt_x)_2B_2C was measured at 0.5 K under magnetic fields H up to 7T. In nominally pure YNi_2B_2C, which is a strongly anisot…
Microwave and millimeter wave spectroscopy in the slightly hole-doped ladders of SrCuO
H. Kitano, R. Inoue, T. Hanaguri +6
We have measured the temperature- and frequency dependence of the microwave and millimeter wave conductivity along both the ladder (c-axis) and the leg (a-axis) directio…
Direct observation of the washboard noise of a driven vortex lattice in a high-temperature superconductor, Bi2Sr2CaCu2Oy
Yoshihiko Togawa, Ryuichi Abiru, Katsuya Iwaya +2
We studied the conduction noise spectrum in the vortex state of a high-temperature superconductor, Bi2Sr2CaCu2Oy, subject to a uniform driving force. Two characteristic features, a…