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Journal Articles

Single crystal growth and physical properties of ternary uranium compounds U$${M_2}$$Al$$_{10}$$ ($$M$$=Fe, Ru and Os)

Sugai, Takashi; Haga, Yoshinori; Matsuda, Tatsuma; Yamamoto, Etsuji; Tateiwa, Naoyuki; Honda, Fuminori*; Settai, Rikio*; Onuki, Yoshichika

Journal of Physics; Conference Series, 273, p.012122_1 - 012122_4, 2011/02

 Times Cited Count:0 Percentile:0.03

Journal Articles

Relation between metamagnetic transition and quantum critical point in heavy fermion compound YbIr$$_2$$Zn$$_{20}$$

Onuki, Yoshichika; Yasui, Shinichi*; Yoshiuchi, Shingo*; Oya, Masahiro*; Matsushita, Masaki*; Hirose, Yusuke*; Takeuchi, Tetsuya*; Honda, Fuminori*; Settai, Rikio*; Sugiyama, Kiyohiro*; et al.

Journal of Physics; Conference Series, 273, p.012013_1 - 012013_4, 2011/02

 Times Cited Count:0 Percentile:0.03

Journal Articles

Magnetization in the superconducting mixed state of the heavy-fermion compound UBe$$_{13}$$

Shimizu, Yusei*; Ikeda, Yoichi*; Wakabayashi, Takumi*; Tenya, Kenichi*; Haga, Yoshinori; Hidaka, Hiroyuki*; Yanagisawa, Tatsuya*; Amitsuka, Hiroshi*

Journal of Physics; Conference Series, 273, p.012084_1 - 012084_4, 2011/02

 Times Cited Count:3 Percentile:66.37

Journal Articles

Electronic structure of U(Ru$$_{1-x}$$Rh$$_{x}$$)$$_2$$Si$$_2$$ studied by laser angle-resolved photoemission spectroscopy

Yoshida, Rikiya*; Nakamura, Yoshiaki*; Fukui, Masaki*; Haga, Yoshinori; Yamamoto, Etsuji; Onuki, Yoshichika; Okawa, Mario*; Shin, S.*; Hirai, Masaaki*; Muraoka, Yuji*; et al.

Journal of Physics; Conference Series, 273, p.012021_1 - 012021_4, 2011/02

 Times Cited Count:0 Percentile:0.03

Journal Articles

Soft X-ray angle-resolved photoemission study of YbCu$$_2$$Ge$$_2$$

Yasui, Akira; Fujimori, Shinichi; Kawasaki, Ikuto; Okane, Tetsuo; Takeda, Yukiharu; Saito, Yuji; Yamagami, Hiroshi; Sekiyama, Akira*; Settai, Rikio*; Matsuda, Tatsuma; et al.

Journal of Physics; Conference Series, 273, p.012067_1 - 012067_4, 2011/02

 Times Cited Count:3 Percentile:66.37

Soft X-ray photoemission spectroscopies have been performed on YbCu$$_2$$Ge$$_2$$, which is thought to be a Yb divalent system, to investigate its bulk electronic structure including Yb 4$$f$$ electrons. Small but finite Yb$$^{3+}$$ multiplet peaks were found at 6$$sim$$12 eV in the angle-integrated spectrum, suggesting that it is a valence fluctuation compound. An "anti-crossing" Yb 4$$f$$ bands with conduction bands were observed in the angle-resolved spectrum. This is the evidence that the Yb 4$$f$$ electrons form a band state through the hybridization with Ge 4$$p$$ and Cu 3$$d$$ electrons.

Journal Articles

Anomalous low-field diamagnetic response in ultraclean URu$$_2$$Si$$_2$$ superconductor

Okazaki, Ryuji*; Shimozawa, Masaaki*; Shishido, Hiroaki*; Konczykowski, M.*; Haga, Yoshinori; Matsuda, Tatsuma; Yamamoto, Etsuji; Onuki, Yoshichika; Yanase, Yoichi*; Shibauchi, Takasada*; et al.

Journal of Physics; Conference Series, 273, p.012081_1 - 012081_4, 2011/02

 Times Cited Count:3 Percentile:66.37

Journal Articles

High-pressure electrical resistivity measurement on heavy fermion superconductor URu$$_2$$Si$$_2$$ using super clean crystal

Tateiwa, Naoyuki; Matsuda, Tatsuma; Haga, Yoshinori; Yamamoto, Etsuji; Onuki, Yoshichika

Journal of Physics; Conference Series, 273, p.012087_1 - 012087_5, 2011/02

 Times Cited Count:4 Percentile:73.87

We have measured the electrical resistivity of URu$$_2$$Si$$_2$$ under high pressure using a high quality single crystal sample. The pressure phase diagram was re-investigated. With increasing pressure, the transition temperature $$T_0$$ from the paramagnetic to the "hidden order" states increases and the superconducting transition temperature $$T_{sc}$$ decreases simply. Below $$P_x$$, a power law exponent $$n$$ smaller than 2 is required to represent the data and the values of $$n$$ are generally about 1.5 $$pm$$ 0.1. Above $$P_x$$, $$n$$ increases with increasing pressure and the value is about 2.0 at 1.51 GPa. It is suggested that the derivation of the exponent $$n$$ from the Fermi liquid theory is intrinsic to the hidden order state.

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