Zobrazeno 1 - 10
of 1 371
pro vyhledávání: '"Takubo, K"'
Autor:
Yu, H., Fukada, Y., Nishida, G., Takubo, K., Ishikawa, T., Koshihara, S., Ikeda, N., Okimoto, Y.
Femtosecond time-resolved second harmonic generation (SHG) measurements were performed at room temperature on a single crystal of LuFe2O4, which has recently attracted attention as an electronic ferroelectric material in which polarization occurs due
Externí odkaz:
http://arxiv.org/abs/2405.06243
Autor:
Mizokawa, T., Barinov, A., Kandyba, V., Giampietri, A., Matsumoto, R., Okamoto, Y., Takubo, K., Miyamoto, K., Okuda, T., Pyon, S., Ishii, H., Kudo, K., Nohara, M., Saini, N. L.
Angle-resolved photoemission spectromicroscopy on IrTe2 reveals evolution of mesoscopic striped domains across its first order phase transition at about 280 K. The striped texture of the domains is characterized by a herringbone arrangement of the el
Externí odkaz:
http://arxiv.org/abs/2112.05930
Autor:
Yokoyama, Y., Kawakami, K., Hirata, Y., Takubo, K., Yamamoto, K., Abe, K., Mitsuda, A., Wada, H., Uozumi, T., Yamamoto, S., Matsuda, I., Mimura, K., Wadati, H.
Publikováno v:
Phys. Rev. B 100, 115123 (2019)
The photoinduced valence dynamics of EuNi$_2$(Si$_{0.21}$Ge$_{0.79}$)$_2$ are investigated using time-resolved X-ray absorption spectroscopy for Eu $M_5$-edge. Through the pump-probe technique with synchrotron X-ray and Ti:sapphire laser pulse, a pho
Externí odkaz:
http://arxiv.org/abs/1905.04120
Autor:
Takubo, K., Yamamoto, K., Hirata, Y., Wadati, H., Mizokawa, T., Sutarto, R., He, F., Ishii, K., Yamasaki, Y., Nakao, H., Murakami, Y., Matsuo, G., Ishii, H., Kobayashi, M., Kudo, K., Nohara, M.
The electronic-structural modulations of Ir$_{1-x}$Pt$_x$Te$_2$ (0 $\leqq x\leqq$ 0.12) have been examined by resonant elastic x-ray scattering (REXS) and resonant inelastic x-ray scattering (RIXS) techniques at both the Ir and Te edges. Charge-densi
Externí odkaz:
http://arxiv.org/abs/1805.05547
Autor:
Horio, M., Krockenberger, Y., Yamamoto, K., Yokoyama, Y., Takubo, K., Hirata, Y., Sakamoto, S., Koshiishi, K., Yasui, A., Ikenaga, E., Shin, S., Yamamoto, H., Wadati, H., Fujimori, A.
Publikováno v:
Phys. Rev. Lett. 120, 257001 (2018)
In order to realize superconductivity in cuprates with the T'-type structure, not only chemical substitution (Ce doping) but also post-growth reduction annealing is necessary. In the case of thin films, however, well-designed reduction annealing alon
Externí odkaz:
http://arxiv.org/abs/1710.09028
Autor:
Yokoyama, Y., Yamasaki, Y., Taguchi, M., Hirata, Y., Takubo, K., Miyawaki, J., Harada, Y., Asakura, D., Fujioka, J., Nakamura, M., Daimon, H., Kawasaki, M., Tokura, Y., Wadati, H.
Publikováno v:
Phys. Rev. Lett. 120, 206402 (2018)
The spin states of Co$^{3+}$ ions in perovskite-type LaCoO$_3$, governed by complex interplay between the electron-lattice interactions and the strong electron correlations, still remain controversial due to the lack of experimental techniques which
Externí odkaz:
http://arxiv.org/abs/1708.07529
Autor:
Ootsuki, D., Takubo, K., Kudo, K., Ishii, H., Nohara, M., Saini, N. L., Sutarto, R., He, F., Regier, T. Z., Zonno, M., Schneider, M., Levy, G., Sawatzky, G. A., Damascelli, A., Mizokawa, T.
Publikováno v:
Phys. Rev. B, 90,144515 (2014)
We report a photoemission and x-ray absorption study on Au1-xPtxTe2 (x = 0 and 0.35) triangular lattice in which superconductivity is induced by Pt substitution for Au. Au 4f and Te 3d core-level spectra of AuTe2 suggests a valence state of Au2+(Te2)
Externí odkaz:
http://arxiv.org/abs/1410.2967
Autor:
Takubo, K., Comin, R., Ootsuki, D., Mizokawa, T., Wadati, H., Takahashi, Y., Shibata, G., Fujimori, A., Sutarto, R., He, F., Pyon, S., Kudo, K., Nohara, M., Levy, G., Elfimov, I., Sawatzky, G. A., Damascelli, A.
Publikováno v:
Phys. Rev. B 90, 081104(R) (2014)
The coupled electronic-structural modulations of the ligand states in IrTe$_2$ have been studied by x-ray absorption spectroscopy (XAS) and resonant elastic x-ray scattering (REXS). Distinctive pre-edge structures are observed at the Te-$M_{4,5}$ (3$
Externí odkaz:
http://arxiv.org/abs/1405.7766
Unconventional peak structure in the Raman spectra due to magnon excitation at low temperature is observed in spinel magnet ${\rm MnV_2O_4}$, where a noncollinear spin state is realized by geometrical frustration. We propose a new mechanism to induce
Externí odkaz:
http://arxiv.org/abs/1012.4073
We have studied disorder-induced in-gap states and effect of light illumination in the insulating phase of spinel-type CuIr$_2$S$_4$ using ultra-violet photoemission spectroscopy (UPS). The Ir$^{3+}$/Ir$^{4+}$ charge-ordered gap appears below the met
Externí odkaz:
http://arxiv.org/abs/0808.1810