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Endo, Yukihiro*; Fukaya, Yuki; Mochizuki, Izumi*; Takayama, Akari*; Hyodo, Toshio*; Hasegawa, Shuji*
Carbon, 157, p.857 - 862, 2020/02
Times Cited Count：19 Percentile：74.57(Chemistry, Physical)no abstracts in English
Fukaya, Yuki; Kawasuso, Atsuo*; Ichimiya, Ayahiko*; Hyodo, Toshio*
Journal of Physics D; Applied Physics, 52(1), p.013002_1 - 013002_19, 2019/01
Times Cited Count：11 Percentile：17.13(Physics, Applied)no abstracts in English
Hyodo, Toshio*; Wada, Ken*; Mochizuki, Izumi*; Kimura, Masao*; Toge, Nobukazu*; Shidara, Tetsuo*; Fukaya, Yuki; Maekawa, Masaki*; Kawasuso, Atsuo*; Iida, Shimpei*; et al.
Journal of Physics; Conference Series, 791(1), p.012003_1 - 012003_8, 2017/02
Times Cited Count：3 Percentile：76.05no abstracts in English
Fukaya, Yuki; Matsuda, Iwao*; Feng, B.*; Mochizuki, Izumi*; Hyodo, Toshio*; Shamoto, Shinichi
2D Materials (Internet), 3(3), p.035019_1 - 035019_7, 2016/09
Times Cited Count：45 Percentile：81.64(Materials Science, Multidisciplinary)no abstracts in English
(110)(1
2) surface using total-reflection high-energy positron diffraction (TRHEPD)Mochizuki, Izumi*; Ariga, Hiroko*; Fukaya, Yuki; Wada, Ken*; Maekawa, Masaki*; Kawasuso, Atsuo*; Shidara, Tetsuo*; Asakura, Kiyotaka*; Hyodo, Toshio*
Hyomen Kagaku, 37(9), p.451 - 456, 2016/09
no abstracts in English
Fukaya, Yuki; Entani, Shiro; Sakai, Seiji; Mochizuki, Izumi*; Wada, Ken*; Hyodo, Toshio*; Shamoto, Shinichi
Carbon, 103, p.1 - 4, 2016/07
Times Cited Count：21 Percentile：59.81(Chemistry, Physical)no abstracts in English
(110)-(12) surface using total-reflection high-energy positron diffraction (TRHEPD)Mochizuki, Izumi*; Ariga, Hiroko*; Fukaya, Yuki; Wada, Ken*; Maekawa, Masaki; Kawasuso, Atsuo; Shidara, Tetsuo*; Asakura, Kiyotaka*; Hyodo, Toshio*
Physical Chemistry Chemical Physics, 18(10), p.7085 - 7092, 2016/03
Times Cited Count：17 Percentile：62.86(Chemistry, Physical)no abstracts in English
Fukaya, Yuki; Hyodo, Toshio*
Hoshasen To Sangyo, (139), p.13 - 17, 2015/12
no abstracts in English
Fukaya, Yuki; Maekawa, Masaki; Kawasuso, Atsuo; Mochizuki, Izumi*; Wada, Ken*; Shidara, Tetsuo*; Ichimiya, Ayahiko*; Hyodo, Toshio*
Applied Physics Express, 7(5), p.056601_1 - 056601_4, 2014/05
Times Cited Count：18 Percentile：61.63(Physics, Applied)no abstracts in English
Fukaya, Yuki; Maekawa, Masaki; Mochizuki, Izumi*; Wada, Ken*; Hyodo, Toshio*; Kawasuso, Atsuo
Journal of Physics; Conference Series, 505, p.012005_1 - 012005_6, 2014/04
Times Cited Count：1 Percentile：51.93no abstracts in English
Hyodo, Toshio*; Fukaya, Yuki; Maekawa, Masaki; Mochizuki, Izumi*; Wada, Ken*; Shidara, Tetsuo*; Ichimiya, Ayahiko*; Kawasuso, Atsuo
Journal of Physics; Conference Series, 505(1), p.012001_1 - 012001_5, 2014/04
Times Cited Count：8 Percentile：93.24no abstracts in English
Fukaya, Yuki; Mochizuki, Izumi*; Maekawa, Masaki; Wada, Ken*; Hyodo, Toshio*; Matsuda, Iwao*; Kawasuso, Atsuo
Physical Review B, 88(20), p.205413_1 - 205413_4, 2013/11
Times Cited Count：65 Percentile：91.08(Materials Science, Multidisciplinary)no abstracts in English
Fukaya, Yuki; Maekawa, Masaki; Mochizuki, Izumi; Wada, Ken*; Hyodo, Toshio*; Kawasuso, Atsuo
Journal of Physics; Conference Series, 443(1), p.012068_1 - 012068_6, 2013/06
Times Cited Count：12 Percentile：96.8no abstracts in English
Mochizuki, Izumi; Fukaya, Yuki; Kawasuso, Atsuo; Yaji, Koichiro*; Harasawa, Ayumi*; Matsuda, Iwao*; Wada, Ken*; Hyodo, Toshio*
Physical Review B, 85(24), p.245438_1 - 245438_6, 2012/06
Times Cited Count：19 Percentile：62.02(Materials Science, Multidisciplinary)The atomic configuration and electronic band structure of Pt-induced nanowires on a Ge(001) surface are investigated using scanning tunneling microscopy, reflection high-energy positron diffraction, and angle-resolved photoemission spectroscopy. A previously proposed theoretical model, composed of Ge dimers on the top layer and buried Pt arrays in the second and fourth layers, is found to be the fundamental structure of the observed nanowires. At low temperatures (
80 K), each Ge dimer is alternately tilted in the surface normal direction (asymmetric), causing a p(
) periodicity. At high temperatures ( 
110 K), each Ge dimer is flat with respect to the horizontal axis (symmetric), giving rise to p (
) periodicity. Upon the above phase transition, the electronic band dispersion related to the Ge dimers in the deeper energy region shifts to the Fermi level.
Wada, Ken*; Hyodo, Toshio*; Yagishita, Akira*; Ikeda, Mitsuo*; Osawa, Satoshi*; Shidara, Tetsuo*; Michishio, Koji*; Tachibana, Takayuki*; Nagashima, Yasuyuki*; Fukaya, Yuki; et al.
European Physical Journal D, 66(2), p.37 - 40, 2012/02
Times Cited Count：38 Percentile：86(Optics)no abstracts in English
Hirade, Tetsuya; Suzuki, Naoki*; Saito, Fuminori*; Hyodo, Toshio*
Physica Status Solidi (C), 4(10), p.3714 - 3717, 2007/09
Times Cited Count：6 Percentile：82.57Positronium (Ps) can be formed by a reaction of trapped electrons and free positrons at low temperatures in molecular solids. While Ps formation by Ore and spur process must be fast, Ps formation by trapped electrons and free positrons is possible even at later positron age. The evidence of this delayed Ps formation was obtained by age-momentum correlation measurement of electron-positron pair annihilation 
-rays. In this work the 
parameter curves measured with trapped electrons and no trapped electrons in polyethylene are interpreted by introducing possible positron reactions. Positrons that escape from Ps formation by the Ore and the spur processes have chance to form Ps with trapped electrons. This Ps formation competes with the positron localization resulting from the trapping between molecules or the weakly binding on molecules, ions, or radicals. Assuming the possibility of both the delayed Ps formation and delayed positron trapping and that S-parameters for ortho-Ps and free positrons are the same, we obtain a good fit to the observed time dependent S-parameter curves .
Suzuki, Naoki*; Hirade, Tetsuya; Saito, Fuminori*; Hyodo, Toshio*
Radiation Physics and Chemistry, 68(3-4), p.647 - 649, 2003/10
Times Cited Count：23 Percentile：81.1(Chemistry, Physical)no abstracts in English
Hirade, Tetsuya; Suzuki, Naoki*; Saito, Fuminori*; Hyodo, Toshio*
no journal, ,
The electrons formed by ionization can be localized with 0.5-3eV at low temperatures (below -50
C) in some materials for long time. Positrons injected in liquids and molecular solids have a chance to form positronium with one of the excess electrons in the spur. However some of the positrons can escape from the positronium formation and they will annihilates from free positron state, usually. If there are weakly localized electrons in the materials at low temperatures, positrons will have the next chance to form positronium with these electrons. We showed that this positornium formation was slower than the positoronium formation in the spur. We have analyzed the data with considering the positron localization time and obtained several 10 ps as the localization time of positrons in polyethylene at 20K.
Fukaya, Yuki; Maekawa, Masaki; Wada, Ken*; Hyodo, Toshio*; Kawasuso, Atsuo
no journal, ,
no abstracts in English
Wada, Ken*; Hyodo, Toshio*; Yagishita, Akira*; Ikeda, Mitsuo*; Osawa, Satoshi*; Shidara, Tetsuo*; Michishio, Koji*; Suzuki, Ryohei*; Tachibana, Takayuki*; Nagashima, Yasuyuki*; et al.
no journal, ,
no abstracts in English
