Zobrazeno 1 - 10
of 267
pro vyhledávání: '"Maeda, Atsutaka"'
Autor:
Matsumoto, Gaku, Ogawa, Ryo, Higasa, Koji, Kobayashi, Tomoki, Nakagawa, Hiroki, Maeda, Atsutaka
Complex conductivity measurements spanning the entire temperature range, including the vicinity of $T_c$, were conducted on systematically varied FeSe$_{1-x}$Te$_x$ ($x$ = 0 - 0.5) very thin films. By applying a novel cavity measurement technique emp
Externí odkaz:
http://arxiv.org/abs/2402.18082
Autor:
Nakamura, Sachiko, Matsumoto, Haruki, Ogawa, Hiroki, Kobayashi, Tomoki, Nabeshima, Fuyuki, Maeda, Atsutaka, Shimano, Ryo
Publikováno v:
Phys. Rev. Lett. 133, 036004 (2024)
We have investigated the vortex dynamics in a thin film of an iron-based superconductor FeSe$_{0.5}$Te$_{0.5}$ by observing second-harmonic generation (SHG) in the THz frequency range. We visualized the picosecond trajectory of two-dimensional vortex
Externí odkaz:
http://arxiv.org/abs/2401.07397
Publikováno v:
J. Phys.: Condens. Matter 35 41LT01 (2023)
In this study, we grow FeSe/SrTiO$_{3}$ with thicknesses of 4-19 nm using pulsed laser deposition and investigate their magneto-transport properties. The thinnest film (4 nm) exhibit negative Hall effect, indicating electron transfer into FeSe from t
Externí odkaz:
http://arxiv.org/abs/2306.11462
Autor:
Miura, Masashi, Tsuchiya, Go, Harada, Takumu, Sakuma, Keita, Kurokawa, Hodaka, Sekiya, Naoto, Kato, Yasuyuki, Yoshida, Ryuji, Kato, Takeharu, Nakaoka, Koichi, Izumi, Teruo, Nabeshima, Fuyuki, Maeda, Atsutaka, Okada, Tatsumori, Awaji, Satoshi, Civale, Leonardo, Maiorov, Boris
Publikováno v:
NPG Asia Mater 14, 85 (2022)
The addition of artificial pinning centers has led to an impressive increase in critical current density ($J_{\rm c}$) in a superconductor, enabling record-breaking all-superconducting magnets and other applications. $J_{\rm c}$ has reached $\sim 0.2
Externí odkaz:
http://arxiv.org/abs/2210.11688
Autor:
Mier, Cristina, Hwang, Jiyoon, Kim, Jinkyung, Bae, Yujeong, Nabeshima, Fuyuki, Imai, Yoshinori, Maeda, Atsutaka, Lorente, Nicolás, Heinrich, Andreas, Choi, Deung-Jang
Publikováno v:
Phys. Rev. B 104, 045406 (2021)
Electronic states in the gap of a superconductor inherit intriguing many-body properties from the superconductor. Here, we create these in-gap states by manipulating Cr atomic chains on the $\beta$-Bi$_2$Pd superconductor. We find that the topologica
Externí odkaz:
http://arxiv.org/abs/2104.06171
Publikováno v:
J. Appl. Phys. 129, 015102 (2021)
We developed a new microwave Hall effect measurement method for materials in the skin depth region at low temperatures using a cross-shaped bimodal cavity. We analytically calculated electromagnetic fields in the cross-shaped cavity, and the response
Externí odkaz:
http://arxiv.org/abs/2011.12654
Autor:
Shikama, Naoki, Sakishita, Yuki, Nabeshima, Fuyuki, Katayama, Yumiko, Ueno, Kazunori, Maeda, Atsutaka
Publikováno v:
Appl. Phys. Express 13, 083006 (2020)
In this study, we investigated the gate voltage dependence of $T_{\mathrm c}$ in electrochemically etched FeSe films with an electric-double layer transistor structure. The $T_{\mathrm c}^{\mathrm {zero}}$ value of the etched FeSe films with a lower
Externí odkaz:
http://arxiv.org/abs/2005.06982
Publikováno v:
Phys. Rev. B 101, 184517 (2020)
We comparatively investigated the transport properties for S- and Te-substituted FeSe thin films under magnetic fields to clarify the origin of the contrasting behavior of the superconducting transition temperature in S and Te substitution. A classic
Externí odkaz:
http://arxiv.org/abs/1906.04894
Autor:
Yoshikawa, Naotaka, Takayama, Masayuki, Shikama, Naoki, Ishikawa, Tomoya, Nabeshima, Fuyuki, Maeda, Atsutaka, Shimano, Ryo
Publikováno v:
Phys. Rev. B 100, 035110 (2019)
We performed terahertz magneto-optical spectroscopy of FeSe thin film to elucidate the charge carrier dynamics. The measured diagonal (longitudinal) and off-diagonal (Hall) conductivity spectra are well reproduced by two-carrier Drude model, from whi
Externí odkaz:
http://arxiv.org/abs/1903.00897
Autor:
Konno, Tomohiko, Kurokawa, Hodaka, Nabeshima, Fuyuki, Sakishita, Yuki, Ogawa, Ryo, Hosako, Iwao, Maeda, Atsutaka
Publikováno v:
Phys. Rev. B 103, 014509 (2021)
Exploration of new superconductors still relies on the experience and intuition of experts and is largely a process of experimental trial and error. In one study, only 3% of the candidate materials showed superconductivity. Here, we report the first
Externí odkaz:
http://arxiv.org/abs/1812.01995