M. Taguchi
Nara Institute of Science and Technology
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Publication
Featured researches published by M. Taguchi.
Physical Review Letters | 2004
Koji Horiba; M. Taguchi; A. Chainani; Y. Takata; Eiji Ikenaga; D. Miwa; Yoshinori Nishino; Kenji Tamasaku; Mitsuhiro Awaji; A. Takeuchi; Makina Yabashi; H. Namatame; M. Taniguchi; Hiroshi Kumigashira; Masaharu Oshima; Mikk Lippmaa; M. Kawasaki; Hideomi Koinuma; Keisuke Kobayashi; Tetsuya Ishikawa; Shik Shin
Using hard x-ray (HX; hnu=5.95 keV) synchrotron photoemission spectroscopy (PES), we study the intrinsic electronic structure of La(1-x)Sr(x)MnO(3) (LSMO) thin films. Comparison of Mn 2p core-levels with soft x-ray (SX; hnu approximately 1000 eV) PES shows a clear additional well-screened feature only in HX PES. Takeoff-angle dependent data indicate its bulk (> or =20 A) character. The doping and temperature dependence track the ferromagnetism and metallicity of the LSMO series. Cluster model calculations including charge transfer from doping-induced states show good agreement, confirming this picture of bulk properties reflected in Mn 2p core-levels using HX PES.
Journal of the Physical Society of Japan | 1997
M. Taguchi; Takayuki Uozumi; Akio Kotani
We analyze theoretically X-ray photoemission spectra (XPS) from Mn 2 p and 3 p core-levels in Mn compounds and Mn Kβ X-ray emission spectra (XES) by means of an MX 6 cluster model. In the calculation of 3 p -XPS and Kβ-XES, we take into account the effect of the term-dependent lifetime of the Mn 3 p core-hole due to the 3 p -3 d 3 d super-Coster-Kroning decay. The Kβ-XES is treated as a coherent second-order optical process, and the excitation spectra of Kβ-XES, which reflect the spin-dependent Mn 1 s absorption, are also calculated. It is shown that the effect of the core-hole potential plays an essential role in the excitation spectra of MnF 2 and MnO. The importance of the term-dependent lifetime of the final states is also pointed out.
Physical Review Letters | 2010
Mario Okawa; Masaharu Matsunami; K. Ishizaka; R. Eguchi; M. Taguchi; A. Chainani; Y. Takata; Makina Yabashi; Kenji Tamasaku; Yoichi Nishino; Tetsuya Ishikawa; K Kuga; Naoki Horie; Satoru Nakatsuji; S. Shin
Electronic structures of the quantum critical superconductor β-YbAlB4 and its polymorph α-YbAlB4 are investigated by using bulk-sensitive hard x-ray photoemission spectroscopy. From the Yb 3d core level spectra, the values of the Yb valence are estimated to be ∼2.73 and ∼2.75 for α- and β-YbAlB4, respectively, thus providing clear evidence for valence fluctuations. The valence band spectra of these compounds also show Yb2+ peaks at the Fermi level. These observations establish an unambiguous case of a strong mixed valence at quantum criticality for the first time among heavy fermion systems, calling for a novel scheme for a quantum critical model beyond the conventional Doniach picture in β-YbAlB4.
Physical Review Letters | 2005
M. Taguchi; Ashish Chainani; Koji Horiba; Yasutaka Takata; Makina Yabashi; Kenji Tamasaku; Yoshinori Nishino; D. Miwa; Tetsuya Ishikawa; Tomoyuki Takeuchi; Kazuo Yamamoto; Masaharu Matsunami; Shik Shin; Takayoshi Yokoya; Eiji Ikenaga; Keisuke Kobayashi; Takashi Mochiku; Kazuto Hirata; J. Hori; Kiyotaka Ishii; Fumihiko Nakamura; Takashi Suzuki
Hard X-ray Photoemission spectroscopy (PES) of copper core electronic states, with a probing depth of
Physical Review Letters | 2008
M. Taguchi; M. Matsunami; Y. Ishida; R. Eguchi; A. Chainani; Yasutaka Takata; Makina Yabashi; Kenji Tamasaku; Yoshinori Nishino; Tetsuya Ishikawa; Y. Senba; Hirotada Ohashi; Shik Shin
\sim
Physical Review B | 2008
R. Eguchi; M. Taguchi; M. Matsunami; K. Horiba; Kota Yamamoto; Y. Ishida; A. Chainani; Y. Takata; Makina Yabashi; D. Miwa; Yoshinori Nishino; Kenji Tamasaku; Tetsuya Ishikawa; Y. Senba; Hirotada Ohashi; Yuji Muraoka; Zenji Hiroi; Shik Shin
60 \AA, is used to show that the Zhang-Rice singlet feature is present in La
Physical Review Letters | 2008
Y. Ishida; R. Eguchi; Masaharu Matsunami; Koji Horiba; M. Taguchi; Ashish Chainani; Y. Senba; Haruhiko Ohashi; Hiromichi Ohta; Shik Shin
_2
Physical Review Letters | 2006
Jean-Pascal Rueff; J. P. Itié; M. Taguchi; C. F. Hague; Jean-Michel Mariot; R. Delaunay; J. P. Kappler; N. Jaouen
CuO
Physical Review B | 2005
M. Taguchi; A. Chainani; N. Kamakura; Koji Horiba; Y. Takata; Makina Yabashi; Kenji Tamasaku; Yoshinori Nishino; D. Miwa; Tetsuya Ishikawa; Shik Shin; Eiji Ikenaga; Takayoshi Yokoya; Keisuke Kobayashi; Takashi Mochiku; Kazuto Hirata; Kiyoichiro Motoya
_4
Physical Review Letters | 2010
P. A. Bhobe; Ashish Chainani; M. Taguchi; Tomoyuki Takeuchi; R. Eguchi; Masaharu Matsunami; K. Ishizaka; Yasutaka Takata; M. Oura; Y. Senba; Hirotada Ohashi; Yoshinori Nishino; Makina Yabashi; Kenji Tamasaku; Tetsuya Ishikawa; Koshi Takenaka; Hidenori Takagi; Shik Shin
but is absent in Nd