Zobrazeno 1 - 10
of 805
pro vyhledávání: '"ISHIKAWA, Hajime"'
Autor:
Ishikawa, Hajime, Imajo, Shusaku, Takeda, Hikaru, Kakegawa, Masafumi, Yamashita, Minoru, Yamaura, Jun-ichi, Kindo, Koichi
We report the magnetic properties of a cobalt oxalate metal-organic-framework featuring the hyperoctagon lattice. Our thermodynamic measurements reveal the $J_{\rm{eff}}$ = 1/2 state of the high-spin Co$^{2+}$ (3$\textit{d}^{7}$) ion and the two succ
Externí odkaz:
http://arxiv.org/abs/2404.06923
Autor:
Ishikawa, Hajime, Ishii, Yuto, Yajima, Takeshi, Matsuda, Yasuhiro H., Kindo, Koichi, Shimizu, Yusei, Rousochatzakis, Ioannis, Rößler, Ulrich K., Janson, Oleg
Publikováno v:
Phys. Rev. B 109, L180401 (2024)
We study the magnetism of a layered, spin-$\frac12$ organic-inorganic copper sulfate, which is a close realization of the star lattice antiferromagnet, one of the playgrounds of geometric frustration and resonating valence bond physics in two spatial
Externí odkaz:
http://arxiv.org/abs/2404.06783
Autor:
Hirai, Daigorou, Anbai, Takahito, Konoike, Takako, Uji, Shinya, Hattori, Yuya, Terashima, Taichi, Ishikawa, Hajime, Kindo, Koichi, Katayama, Naoyuki, Oguchi, Tamio, Hiroi, Zenji
Publikováno v:
J. Phys.: Condens. Matter 35, 405503 (2023)
Quantum oscillations in magnetic torque and electrical resistivity were measured to investigate the electronic structure of \b{eta}-ReO2, a candidate hourglass nodal chain metal (Dirac loop chain metal). All the de Haas-van Alphen oscillation branche
Externí odkaz:
http://arxiv.org/abs/2309.08073
Autor:
Eto, Koki, Okamoto, Yoshihiko, Katayama, Naoyuki, Ishikawa, Hajime, Kindo, Koichi, Takenaka, Koshi
Publikováno v:
J. Phys. Soc. Jpn. 92, 094707 (2023)
NaPrTe2, NaNdTe2, and NaTbTe2 are found to be triangular lattice magnets with the alpha-NaFeO2 structure, where lanthanoid atoms with 4f electrons form a triangular lattice, based on the structural analysis and physical property measurements of synth
Externí odkaz:
http://arxiv.org/abs/2307.06516
Autor:
Ishikawa, Hajime, Yajima, Takeshi, Nishio-Hamane, Daisuke, Imajo, Shusaku, Kindo, Koichi, Kawamura, Mitsuaki
Publikováno v:
Phys. Rev. Materials 7, 05480 (2023)
We discovered superconductivity at $T_c$ = 12 K in a layered compound La$_2$IOs$_2$ with osmium honeycomb network. Despite heavy constituent elements unfavorable for phonon mediated mechanism, $T_c$ is the highest among lanthanoid iodides made of lig
Externí odkaz:
http://arxiv.org/abs/2306.01239
Autor:
Nakamura, Raito, Ishita, Azumi, Nakamura, Jin, Ohta, Hiroto, Haraguchi, Yuya, Katori, Hiroko Aruga, Ishikawa, Hajime, Matsuo, Akira, Kindo, Koichi, Nohara, Minoru, Ikeda, Akihiko
The solid solution 122 compounds, Eu(Co$_{1-x}$Ni$_{x}$)$_{2}$P$_{2}$, show valence transition between divalent state and intermediate valence states at Eu, which is firmly correlated to multiple degrees of freedom in the solid such as the isostructu
Externí odkaz:
http://arxiv.org/abs/2303.02910
Autor:
Ishikawa, Hajime, Kurihara, Ryosuke, Yajima, Takeshi, Nishio-Hamane, Daisuke, Shimizu, Yusei, Sakakibara, Toshiro, Matsuo, Akira, Kindo, Koichi
Publikováno v:
Phys. Rev. Materials 6, 064405 (2022)
We report magnetic properties of a 4f-honeycomb iodide SmI3 made up of edge-shared network of SmI6 octahedra. High temperature magnetic susceptibility indicates {\Gamma}7 Kramers doublet ground state of Sm3+ (4f5) ions stabilized by the spin-orbit co
Externí odkaz:
http://arxiv.org/abs/2206.03628
Autor:
Ishikawa, Hajime, Hirai, Daigorou, Ikeda, Akihiko, Gen, Masaki, Yajima, Takeshi, Matsuo, Akira, Matsuda, Yasuhiro H., Hiroi, Zenji, Kindo, Koichi
Publikováno v:
Phys. Rev. B 104, 174422 (2021)
Magnetic properties of an antiferromagnetic double perovskite oxide Ba2CaReO6, where Re6+ (5d1) ions with large spin-orbit coupling are arranged on the face-centered-cubic lattice, are investigated using pulsed high magnetic field up to 66 T. Magneti
Externí odkaz:
http://arxiv.org/abs/2111.03807
Publikováno v:
J. Phys. Soc. Jpn. 90, 124704 (2021)
Electronic properties of the single crystal of GdV6Sn6, where non-magnetic V-kagome layers are separated by magnetic Gd-triangular lattice, are investigated. GdV6Sn6 exhibits unique magnetotransport properties at low-temperature such as non-linear Ha
Externí odkaz:
http://arxiv.org/abs/2111.03806
Autor:
Harada, Keiichi, Teramoto, Yuki, Usui, Tomohiro, Itaka, Kenji, Fujii, Takenori, Noji, Takashi, Taniguchi, Haruka, Matsukawa, Michiaki, Ishikawa, Hajime, Kindo, Koichi, Dessau, Daniel S., Watanabe, Takao
Publikováno v:
Phys. Rev. B 105, 085131 (2022)
Although phase diagrams can be leveraged to investigate high transition temperature (high-$T_c$) superconductivity, the issue has not been discussed thoroughly. In this study, we elucidate the phase diagram of the overdoped side of high-$T_c$ cuprate
Externí odkaz:
http://arxiv.org/abs/2109.11799