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332 results on '"Sugai, I."'

1. Surface-assisted Spin Hall Effect in Au Films with Pt Impurities

Author

Gu, B., Sugai, I., Ziman, T., Guo, G. Y., Nagaosa, N., Seki, T., Takanashi, K., and Maekawa, S.

Subjects
Condensed Matter - Materials Science
Abstract

We show, both experimentally and theoretically, a novel route to obtain giant room temperature spin Hall effect due to surface-assisted skew scattering. In the experiment, we report the spin Hall effect in Pt-doped Au films with different thicknesses $t_N$. The giant spin Hall angle $\gamma_S$ = $0.12 \pm 0.04$ is obtained for $t_N$ = 10 nm at room temperature, while it is much smaller for $t_N$ = 20 nm sample. Combined ab initio and quantum Monte Carlo calculations for the skew scattering due to a Pt impurity show $\gamma_S$ $\cong$ 0.1 on the Au (111) surface, while it is small in bulk Au. The quantum Monte Carlo results show that the spin-orbit interaction of the Pt impurity on the Au (111) surface is enhanced, because the Pt 5d levels are lifted to the Fermi level due to the valence fluctuation. In addition, there are two spin-orbit interaction channels on the Au (111) surface, while only one in bulk Au., Comment: 4 pages, 2 figures

Published
2010
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17. Elastic scattering for the system 11Be + 209Bi at Coulomb barrier energies

Author

Mazzocco, M., Signorini, C., Romoli, M., Bonetti, R., De Francesco, A., De Rosa, A., Di Pietro, M., Fortunato, L., Glodariu, T., Guglielmetti, A., Inglima, G., Ishikawa, T., Ishiyama, H., Kanungo, R., Khai, N., Jeong, S., La Commara, M., Martin, B., Miyatake, H., Motobayashi, T., Nomura, T., Pierroutsakou, D., Sandoli, M., Soramel, F., Stroe, L., Sugai, I., Tanaka, M. H., Vardaci, E., Watanabe, Y., Yoshida, A., and Yoshida, K.

Published
2007
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18. Scattering of 11Be halo nucleus from 209Bi at the Coulomb barrier

Author

Mazzocco, M., Signorini, C., Romoli, M., De Francesco, A., Di Pietro, M., Vardaci, E., Yoshida, K., Yoshida, A., Bonetti, R., De Rosa, A., Glodariu, T., Guglielmetti, A., Inglima, G., La Commara, M., Martin, B., Pierroutsakou, D., Sandoli, M., Soramel, F., Stroe, L., Kanungo, R., Khai, N., Motobayashi, T., Nomura, T., Ishikawa, T., Ishiyama, H., Jeong, S., Miyatake, H., Tanaka, M. H., Sugai, I., and Watanabe, Y.

Published
2006
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24. A naturally occurring trap for antiprotons

Author

Eades, J., Morita, N., Ito, T. M., Ito, Y., Kawachi, A., Nakamura, S. N., Hayano, R. S., Iwasaki, M., Shigaki, K., Tamura, H., Sugai, I., Widmann, E., Yamazaki, T., Higemoto, W., Nishida, N., Hartmann, F. J., Daniel, H., von Egidy, T., Hofmann, P., and Kim, Y. -S.

Published
1993
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33. Investigating neutron-proton pairing in sd -shell nuclei via (p,He3) and (He3,p) transfer reactions

Author

Ayyad, Y., primary, Lee, J., additional, Tamii, A., additional, Lay, J. A., additional, Macchiavelli, A. O., additional, Aoi, N., additional, Brown, B. A., additional, Fujita, H., additional, Fujita, Y., additional, Ganioglu, E., additional, Hatanaka, K., additional, Hashimoto, T., additional, Ito, T., additional, Kawabata, T., additional, Li, Z., additional, Liu, H., additional, Matsubara, H., additional, Miki, K., additional, Ong, H. J., additional, Potel, G., additional, Sugai, I., additional, Susoy, G., additional, Vitturi, A., additional, Watanabe, H. D., additional, Yokota, N., additional, and Zenihiro, J., additional

Published
2017
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36. Scattering of Be-11 halo nucleus from Bi-209 at the Coulomb barrier

Author

Mazzocco, Marco, Signorini, Cosimo, Romoli, M, DE FRANCESCO, A, DI PIETRO, M, Vardaci, E, Yoshida, K, Yoshida, A, Bonetti, R, DE ROSA, A, Glodariu, T, Guglielmetti, A, Inglima, G, LA COMMARA, M, Martin, B, Pierroutsakou, D, Sandoli, M, Soramel, Francesca, Stroe, L, Kanungo, R, Khai, N, Motobayashi, T, Nomura, T, Ishikawa, T, Ishiyama, H, Jeong, S, Miyatake, H, Tanaka, Mh, Sugai, I, and Watanabe, Y.

Published
2006

37. Scattering process for the system 11Be+209Bi at Coulomb barrier energies with the EXPLODET apparatus

Author

Mazzocco, Marco, Signorini, Cosimo, Glodariu, T., Stroe, L., Romoli, M., DE FRANCESCO, A., DI PIETRO, M., Vardaci, E., DE ROSA, A., Inglima, G., LA COMMARA, M., Martin, B., Pierroutsakou, D., Sandoli, M., Bonetti, R., Guglielmetti, A., Soramel, F., Yoshida, K., Yoshida, A., Kamungo, R., Khai, N., Motobayashi, T., Nomura, T., Ishikawa, T., Ishiyama, H., Jeong, S., Miyatake, H., Tanaka, M. H., Sugai, I., and Watanabe, Y.

Published
2005

38. Populations and lifetimes in the $v=n-l-1=2$ and 3 metastable cascades of $\overline{p} He^{+}$ measured by pulsed and continuous antiproton beams

Author

Hori, Masaki, Eades, John, Widmann, E, Yamazaki, T, Hayano, R S, Ishikawa, T, Torie, H A, Von Egidy, T, Hartmann, F, Ketzer, B, Maierl, C, Pohl, R, Kumakura, M, Morita, N, Horváth, D, and Sugai, I

Subjects
Physics::Atomic and Molecular Clusters, Other Fields of Physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Physics::Atomic Physics, Nuclear Experiment
Abstract

Using the laser spectroscopy, the time evolution of the state population in the v equivalent n-l=2 and 3 metastable cascades of antiprotonic helium atoms were studied. The effects of the collision between antiprotonic helium and the ordinary helium atoms on the atomic cascade were also analyzed. The measurements were done using the pulsed and continuous types of antiproton beams supplied by the Low Energy Antiproton Ring. The studies revealed five phases in the life history of the metastable antiprotonic helium. (Edited abstract) 71 Refs.

Published
2004

48. High-Precision Structural Studies of the Antiproton Helium Atom $\overline{p}^{4}He^+$ by Observing Laser Resonances with $\Delta v = \Delta (n-l-1) = 2$

Author

Yamazaki, T, Widmann, E, Eades, John, Kumakura, M, Morita, N, Torii, H A, Hori, Masaki, Ishikawa, T, Maas, F E, Tamura, H, Hayano, R S, Sugai, I, Fujita, Y, Ketzer, B, Daniel, H, Hartmann, F J, Hasinoff, M D, Pohl, R, Schmidt, R, Von Egidy, T, and Horváth, D

Subjects
Physics::Atomic Physics, Particle Physics - Experiment
Abstract

Very weak laser resonances of unfavoured transitions $(n,l) \rightarrow (n+1,l-1)$ have been observed in metastable \={p}$^4$He$^+$ atoms by using a pulsed antiproton beam. The observed wavelengths (713.578 $\pm$ 0.006 nm for $l$ = 34 and 726.095 $\pm$ 0.004 nm for $l$ = 35), as well as those of the known favoured transitions, are to a few ppm accounted for by a recent variational calculation of Korobov, which includes the relativistic correction.

Published
1996

49. Observation of double resonant laser induced transitions in the $v = n - l - 1 = 2$ metastable cascade of antiprotonic helium-4 atoms

Author

Hayano, R S, Ishikawa, T, Tamura, H, Torii, H A, Hori, Masaki, Maas, F E, Morita, N, Kumakura, M, Sugai, I, Hartmann, F J, Daniel, H, Von Egidy, T, Ketzer, B, Pohl, R, Horváth, D, Eades, John, Widmann, E, and Yamazaki, T

Subjects
Other Fields of Physics, Physics::Atomic Physics
Abstract

A new laser-induced resonant transition in the $v=n-l-1=2$ metastable cascade of antiprotonic $^4$He atoms has been found by using a double resonance technique. This was done by setting the first laser to the already known 470.724 nm resonance ($(n,l)=(37,34)\rightarrow (36,33)$), while the $(38,35)\rightarrow (37,34)$ transition was searched for with the second laser. The resonant transition was found at wavelength of 529.622$\pm$0.003 nm, showing excellent agreement with a recent prediction of Korobov.

Published
1996

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