Zobrazeno 1 - 10
of 391
pro vyhledávání: '"Koike, Yoji"'
Autor:
Kawamata, Takayuki, Saito, Shin, Tsuji, Naruki, Sumura, Takuya, Adachi, Tadashi, Kato, Masatsune, Sakurai, Yoshiharu, Koike, Yoji
Publikováno v:
Journal of the Physical Society of Japan 91, 114707 (2022)
We have performed Compton scattering measurements on as-grown and reduced single crystals of the electron-doped T'-cuprate Pr1.3-xLa0.7CexCuO4 (x = 0.10) to investigate the effect of reduction annealing on the electronic state. The obtained results h
Externí odkaz:
http://arxiv.org/abs/2210.15995
Autor:
Ramadhan, Muhammad Redo, Adiperdana, Budi, Ramli, Irwan, Sari, Dita Puspita, Putri, Anita Eka, Wydiaiswari, Utami, Rozak, Harion, Zaharim, Wan Nurfadhilah, Manaf, Azwar, Mohamed-Ibrahim, Budhy Kurniawan Mohamed Ismail, Sulaiman, Shukri, Kawamata, Takayuki, Adachi, Tadashi, Koike, Yoji, Watanabe, Isao
The on-site Coulomb potential, U, and the covalent state of electronic orbitals play key roles for the Cooper pair symmetry and exotic electromagnetic properties of high-Tc superconducting cuprates. In this paper, we demonstrate a way to determine th
Externí odkaz:
http://arxiv.org/abs/2207.07926
Publikováno v:
J. Phys. Soc. Jpn. 88, 064708 (2019)
We have measured the temperature dependences of the thermal conductivity of Ba$_2$Cu$_{3-x}M_x$O$_4$Cl$_2$ ($M$ = Pd, Ni, Co; $x$ = 0, 0.03) single crystals including two-dimensional (2D) Cu$_3$O$_4$ planes consisting of a strong 2D spin network of C
Externí odkaz:
http://arxiv.org/abs/2112.08621
Autor:
Fujita, Masaki, Taniguchi, Takanori, Torii, Shuki, Kamiyama, Takashi, Ohashi, Koki, Kawamata, Takayuki, Takamatsu, Tomohisa, Adachi, Tadashi, Kato, Masatsune, Koike, Yoji
Publikováno v:
J. Phys. Soc. Jpn. 90, 105002 (2021)
We performed neutron powder diffraction measurements on the as-sintered (AS) and oxygen-reduced (OR) La$_{1.8}$Eu$_{0.2}$CuO$_{4+\alpha-\delta}$ (LECO). The structural parameters for oxygens in AS and OR samples refined by the Rietveld analysis are a
Externí odkaz:
http://arxiv.org/abs/2108.02078
Autor:
Asano, Shun, Ishii, Kenji, Matsumura, Daiju, Tsuji, Takuya, Kudo, Kota, Taniguchi, Takanori, Saito, Shin, Sunohara, Toshiki, Kawamata, Takayuki, Koike, Yoji, Fujita, Masaki
We performed Cu {\it K}-edge X-ray absorption fine structure measurements on T'-type La$_{1.8}$Eu$_{0.2}$CuO$_4$ (LECO) and Nd$_2$CuO$_4$ (NCO) to investigate the variation in the electronic state associated with the emergence of superconductivity du
Externí odkaz:
http://arxiv.org/abs/2005.10681
Autor:
Sunohara, Toshiki, Kawamata, Takayuki, Shiosaka, Kota, Takamatsu, Tomohisa, Noji, Takashi, Kato, Masatsune, Koike, Yoji
Publikováno v:
Journal of the Physical Society of Japan 89, 014701 (2020)
We have succeeded in synthesizing electron-doped polycrystalline bulk samples of T'-La1.8Eu0.2CuO4-yFy (y = 0 - 0.15) by the fluorination of undoped (Ce-free) T'-La1.8Eu0.2CuO4 using NH4F. The magnetic susceptibility measurements have revealed that t
Externí odkaz:
http://arxiv.org/abs/2003.03088
Autor:
Sun, Yue, Ohnuma, Haruka, Ayukawa, Shin-ya, Noji, Takashi, Koike, Yoji, Tamegai, Tsuyoshi, Kitano, Haruhisa
Publikováno v:
Phys. Rev. B 101, 134516 (2020)
We report the achieving of depairing current limit along $c$-axis in Fe$_{1+y}$Te$_{1-x}$Se$_x$ single crystals. A series of crystals with $T_{\rm{c}}$ ranging from 8.6 K to 13.7 K (different amount of excess Fe, $y$) were fabricated into $c$-axis br
Externí odkaz:
http://arxiv.org/abs/1911.00727
Autor:
Lin, Chun, Horio, Masafumi, Kawamata, Takayuki, Saito, Shin, Koshiishi, Keisuke, Sakamoto, Shoya, Zhang, Yujun, Yamamoto, Kohei, Ikeda, Keisuke, Hirata, Yasuyuki, Takubo, Kou, Wadati, Hiroki, Yasui, Akira, Takagi, Yasumasa, Ikenaga, Eiji, Adachi, Tadashi, Koike, Yoji, Fujimori, Atsushi
Publikováno v:
J. Phys. Soc. Jpn., Vol.88, No.11, 2019
Recently, hole-doped superconducting cuprates with the T'-structure La1.8-xEu0.2SrxCuO4 (LESCO) have attracted a lot of attention. We have performed x-ray photoemission and absorption spectroscopy measurements on as-grown and reduced T0-LESCO. Result
Externí odkaz:
http://arxiv.org/abs/1907.06211
Autor:
Asano, Shun, Suzuki, Kensuke M., Kudo, Kota, Watanabe, Isao, Koda, Akihiro, Kadono, Ryosuke, Noji, Takashi, Koike, Yoji, Taniguchi, Takanori, Kitagawa, Shunsaku, Ishida, Kenji, Fujita, Masaki
Publikováno v:
J. Phys. Soc. Jpn. 88, 084709 (2019)
We investigated the magnetism and superconductivity in as-sintered (AS) and oxidation annealed (OA) T*-type La$_{1-x/2}$Eu$_{1-x/2}$Sr$_x$CuO$_4$ (LESCO) with 0.14 $\leq x \leq$ 0.28 by the first comprehensive muon spin rotation/relaxation ($\mu$SR),
Externí odkaz:
http://arxiv.org/abs/1904.07541
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