Scientific Commons: K. Shimada

Precision measurement of the electric quadrupole moment of 31Al and determination of the effective proton charge in the sd-shell (2009)

De Rydt, M., Neyens, G., Asahi, K., Balabanski, D. L., Daugas, J. M., Depuydt, M., ...

he electric quadrupole coupling constant of the 31Al ground state is measured to be nu_Q = |eQV_{zz}/h| = 2196(21)kHz using two different beta-NMR (Nuclear Magnetic Resonance) techniques. For the...

Measurement of electron correlations in LixCoO2 (x=0.0 - 0.35) using 59Co nuclear magnetic resonance and nuclear quadrupole resonance techniques (2009)

Kawasaki, S., Motohashi, T., Shimada, K., Ono, T., Kanno, R., Karppinen, M., ...

CoO2 is the parent compound for the superconductor NaxCoO2\cdot1.3H2O and was widely believed to be a Mott insulator. We performed 59Co nuclear magnetic resonance (NMR) and nuclear quadrupole...

The orbital characters of bands in iron-based superconductor BaFe1.85Co0.15As2 (2009)

Zhang, Y., Zhou, B., Chen, F., Wei, J., Xu, M., Yang, L. X., ...

Multiple 3d orbitals contribute to the low energy electronic structure in the newly discovered iron-based superconductors. The specific orbital characters of the multi-bands are crucial in...

Impacts of the Oceans on Climate Change (2009)

Reid, P.C., Fischer, A., Lewis-Brown, E., Meredith, M.P., Sparrow, M., Andersson, A.J., ...

Half-life and magnetic moment of the first excited state in I132 (2009)

Tanigaki, Minoru, Izumi, S, Ouchi, H, Sasaki, A, Miyashita, Y, Sato, N, ...

The half-life and the magnetic moment were measured for the first excited state in 132I, of which the inconsistent results on the half-life have been reported by several other groups. This time,...

Ground-state electric quadrupole moment of 31Al (2008)

Nagae, D., Ueno, H., Kameda, D., Takemura, M., Asahi, K., Takase, K., ...

Ground-state electric quadrupole moment of 31Al (I =5/2+, T_1/2 = 644(25) ms) has been measured by means of the beta-NMR spectroscopy using a spin-polarized 31Al beam produced in the projectile...

Two superconducting gaps in LaFeAsO0.92F0.08 revealed by 75As nuclear quadrupole resonance (2008)

Kawasaki, S., Shimada, K., Chen, G. F., Luo, J. L., Wang, N. L., Zheng, Guo-qing

We report $^{75}$As nuclear quadrupole resonance (NQR) studies on superconducting oxypnictide LaFeAsO$_{0.92}$F$_{0.08}$ ($T_{\rm c}$ = 23 K). The temperature dependence of the spin lattice...

Artic Report Card 2008: Tracking Recent Environmental Changes (2008)

Overland, J., Walsh, J., Wang, M., Richter-Menge, J., Comiso, J., Meier, W., ...

There continues to be widespread and, in some cases, dramatic evidence of an overall warming of the Artic system. Atmosphere: 5° C temperature increases were recorded in autumn Ocean: Observed...

Origin of the surface-state band-splitting in ultrathin Bi films: from a Rashba effect to a parity effect (2008)

Hirahara, T., Miyamoto, K., Kimura, A., Niinuma, Y., Bihlmayer, G., Chulkov, Eugene V., ...

12 pages, 4 figures.

Correlation effects of exchange splitting and coexistence of spin-density-wave and superconductivity in single crystalline Sr1-xKxFe2As2 (2008)

Zhang, Y., Wei, J., Ou, H. W., Zhao, J. F., Zhou, B., Chen, F., ...

The nature of spin-density wave and its relation with superconductivity are crucial issues in the newly discovered Fe-based high temperature superconductors. Particularly it is unclear whether the...

An Isotopic Fingerprint of Electron-Phonon Coupling in High-Tc Cuprates (2008)

Iwasawa, H., Douglas, J. F., Sato, K., Masui, T., Yoshida, Y., Sun, Z., ...

Angle-resolved photoemission spectroscopy with low-energy tunable photons along the nodal direction of oxygen isotope substituted Bi2Sr2CaCu2O8+delta reveals a distinct oxygen isotope shift near the...

Electronic structure and exotic exchange splitting in spin-density-wave states of BaFe$_2$As$_2$ (2008)

Yang, L. X., Zhang, Y., Ou, H. W., Zhao, J. F., Shen, D. W., Zhou, B., ...

The magnetic properties in the parent compounds are often intimately related to the microscopic mechanism of superconductivity. Here we report the first direct measurements on the electronic...

Novel electronic structure induced by a highly strained oxide interface with incommensurate crystal fields (2008)

Ou, H. W., Zhao, J. F., Zhang, Y., Xie, B. P., Shen, D. W., Zhu, Y., ...

The misfit oxide, Bi$_{2}$Ba$_{1.3}$K$_{0.6}$Co$_{2.1}$O$_{y}$, made of alternating rocksalt-structured [BiO/BaO] layers and hexagonal CoO$_{2}$ layers, was studied by angle-resolved photoemission...

Primary role of the barely occupied states in the charge density wave formation of NbSe2 (2008)

Shen, D. W., Zhang, Y., Yang, L. X., Wei, J., Ou, H. W., Dong, J. K., ...

NbSe2 is a prototypical charge-density-wave (CDW) material, whose mechanism remains mysterious so far. With angle resolved photoemission spectroscopy, we mapped out the CDW gap and recovered the...

Doping-insensitive density-of-states suppression in polycrystalline iron-based superconductor SmO$_{1-x}$F$_{x}$FeAs (2008)

Ou, H. W., Zhang, Y., Zhao, J. F., Wei, J., Shen, D. W., Zhou, B., ...

We investigated the temperature dependence of the density-of-states in the iron-based superconductor SmO_1-xF_xFeAs (x=0, 0.12, 0.15, 0.2) with high resolution angle-integrated photoemission...

Electronic Structures of Fe$_{3-x}V$_x$Si Probed by Photoemission Spectroscopy (2008)

Cui, Y. T., Kimura, A., Miyamoto, K., Sakamoto, K., Xie, T., Qiao, S., ...

The electronic structures of the Heusler type compounds Fe$_{3-x}V$_x$Si in the concentration range between x = 0 and x = 1 have been probed by photoemission spectroscopy (PES). The observed shift of...

Distributions of surface water CO2 and air-sea flux of CO2 in coastal regions of the Canadian Beaufort Sea in late summer (2008)

A. Murata, K. Shimada, S. Nishino, M. Itoh

To quantify the air-sea flux of CO2 in a high-latitude coastal region, we conducted shipboard observations of atmospheric and surface water partial pressures of...

Distributions of surface water CO2 and air-sea flux of CO2 in coastal regions of the Canadian Beaufort Sea in late summer (2008)

A. Murata, K. Shimada, S. Nishino, M. Itoh

To quantify the air-sea flux of CO2 in a high-latitude coastal region, we conducted shipboard observations of atmospheric and surface water partial pressures of CO2 (pCO2) and total dissolved...

Fe-57 diffusion in n-type Si after GeV implantation of Mn-57 (2007)

Yoshida, Y, Kobayashi, Y, Yukihira, K, Hayakawa, K, Suzuki, K, Yoshida, A, ...

At the RI-beam facility of the RIKEN, Mn-57/Fe-57 isotopes are separated and implanted into n-type FZ-Si (6 x 10(16) As/cm(3)), and subsequently the atomic jump processes of Fe-57 in the Si matrix...

Local implantation of autologous mononuclear cells from bone marrow and peripheral blood for treatment of ischaemic digits in patients with connective tissue diseases (2007)

Kamata, Y., Takahashi, Y., Iwamoto, M., Matsui, K., Murakami, Y., Muroi, K., ...

Objective. CD34-positive bone marrow mononuclear cells (MNCs) have been successfully used for regeneration of small arteries in Buerger's disease. The objective of this study is to examine the...

Wsh3/Tea4 is a novel cell-end factor essential for bipolar distribution of Tea1 and protects cell polarity under environmental stress in S. pombe (2005)

Tatebe, H, Shimada, K, Uzawa, S, Morigasaki, S, Shiozaki, Kazuhiro

Background: The fission yeast Schizosaccharomyces pombe has a cylindrical cell shape, for which growth is strictly limited to both ends, and serves as an excellent model system for genetic analysis...

Response of fission yeast to toxic cations involves cooperative action of the stress-activated protein kinase Spc1/Sty1 and the Hal4 protein kinase (2005)

Wang, L Y, Shimada, K, Morishita, M, Shiozaki, Kazuhiro

Stress-activated protein kinases (SAPKs), members of a mitogen-activated protein kinase (MAPK) subfamily, are highly conserved among eukaryotes. Studies of yeasts demonstrated that SAPKs play pivotal...

Analysis of the mouse transcriptome based on functional annotation of 60,770 full-length cDNAs (2002)

Okazaki, Y., Furuno, M., Kasukawa, T., Adachi, J., Bona, H., Kondo, S., ...