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Tsutsui, Satoshi; Kaneko, Koji; Miyazaki, Ryoichi*; Higashinaka, Ryuji*; Aoki, Yuji*; Kobayashi, Riki*; Wakimoto, Shuichi; Baron, A. Q. R.*; Sugawara, Hitoshi*; Sato, Hideyuki*
JPS Conference Proceedings (Internet), 3, p.011060_1 - 011060_5, 2014/06
Shimizu, Yusei*; Haga, Yoshinori; Yanagisawa, Tatsuya*; Amitsuka, Hiroshi*; Aoki, Dai*; Brison, J.-P.*; Braithwaite, D.*
JPS Conference Proceedings (Internet), 3, p.015009_1 - 015009_6, 2014/06
Nakamura, Ai*; Hiranaka, Yuichi*; Hedo, Masato*; Nakama, Takao*; Miura, Yasunao*; Tsutsumi, Hiroki*; Mori, Akinobu*; Ishida, Kazuhiro*; Mitamura, Katsuya*; Hirose, Yusuke*; et al.
JPS Conference Proceedings (Internet), 3, p.011012_1 - 011012_6, 2014/06
Hirose, Yusuke*; Takeuchi, Tetsuya*; Yoshiuchi, Shingo*; Yamamoto, Etsuji; Haga, Yoshinori; Settai, Rikio*; Onuki, Yoshichika
JPS Conference Proceedings (Internet), 3, p.011056_1 - 011056_6, 2014/06
Matsumoto, Yuji; Haga, Yoshinori; Tateiwa, Naoyuki; Yamamoto, Etsuji; Kimura, Noriaki*; Aoki, Haruyoshi*; Fisk, Z.
JPS Conference Proceedings (Internet), 3, p.011097_1 - 011097_5, 2014/06
Yamamoto, Etsuji; Tateiwa, Naoyuki; Haga, Yoshinori; Ikeda, Shugo*; Sakai, Hironori; Onuki, Yoshichika; Fisk, Z.
JPS Conference Proceedings (Internet), 3, p.011095_1 - 011095_4, 2014/06
Nakamura, Hiroki; Machida, Masahiko
JPS Conference Proceedings (Internet), 3, p.017034_1 - 017034_4, 2014/06
We perform hybrid density functional calculations taking account of spin-orbit couplings on plutonium dioxides in order to numerically obtain its observed ground state, i.e., the paramagnetic insulating state and properly calculate the material properties. Generally, it is known for plutonium dioxides that the standard LDA calculations give metallic states. So far, we clarified that inclusion of the spin-orbit coupling in addition to the strong correlation through LDA+U is responsible for the paramagnetic insulating state. In this paper, we show that hybrid density functional calculations with spin-orbit couplings yield the paramagnetic insulating states similar to those obtained by LDA+U.
Nagai, Yuki; Nakamura, Hiroki; Machida, Masahiko
JPS Conference Proceedings (Internet), 3, p.015013_1 - 015013_6, 2014/06
no abstracts in English
Kobayashi, Keita; Okumura, Masahiko; Ota, Yukihiro*; Yamada, Susumu; Machida, Masahiko
JPS Conference Proceedings (Internet), 3, p.016006_1 - 016006_6, 2014/06
no abstracts in English
Sugimoto, Takanori*; Mori, Michiyasu; Toyama, Takami*; Maekawa, Sadamichi
JPS Conference Proceedings (Internet), 3, p.014016_1 - 014016_5, 2014/06
Matsuda, Yasuhiro*; Her, J.-L.*; Michimura, Shinji*; Inami, Toshiya; Ebihara, Takao*; Amitsuka, Hiroshi*
JPS Conference Proceedings (Internet), 3, p.011044_1 - 011044_6, 2014/06
Synchrotron X-ray absorption spectroscopy of CeRhSi
has been performed in pulsed high magnetic fields of up to 32 T. The Ce valence is slightly larger than 3+ at 5 K and decreases with increasing magnetic above 20 T. The field-induced valence change seems to correspond to the metamagnetic transition in the magnetization process. This phenomena is similar to our previous result on CeRu
Si
and seems to be common in Ce-based heavy fermion compounds.
Kawae, Tatsuya*; Koga, Mikito*; Sato, Yoshiaki*; Makiyama, Shun*; Inagaki, Yuji*; Tateiwa, Naoyuki; Fujiwara, Tetsuya*; Suzuki, Hiroyuki*; Kitai, Tetsuo*
JPS Conference Proceedings (Internet), 3, p.012030_1 - 012030_6, 2014/06
We measure the temperature dependence of the nonlinear susceptibility in Pr
La
Pb
.
reflects the fluctuation of the quadrupolar moments. Non-Fermi liquid behavior of
with
-dependence is detected below 2.5 K, suggesting that the screening of the quadrupolar moments is responsible for the anomalous behavior at low temperatures. These results provide a direct evidence for the crucial role of the quadrupolar moments in Pr
La
Pb
.
Kajimoto, Ryoichi; Nakajima, Kenji; Kawamura, Seiko; Inamura, Yasuhiro; Okuda, Tetsuji*; Tomiyasu, Keisuke*
JPS Conference Proceedings (Internet), 3, p.014018_1 - 014018_5, 2014/06
Nakano, Hiroki*; Sakai, Toru
JPS Conference Proceedings (Internet), 3, p.014003_1 - 014003_6, 2014/06
The magnetization processes of the S=1/2 isotropic Heisenberg quantum antiferromagnets on the kagome and triangular lattices are studied. We find that for the kagome-lattice antiferromagnet, the behavior of the derivative around the 1/3 height of the magnetization saturation is quite different from the cases of typical magnetization plateaux. This new phenomenon is called the "magnetization ramp". In order to clarify the difference between the magnetization ramp and the conventional magnetization plateau, we study a generalized anisotropic triangular-lattice model including the regular-triangular- and the kagome-lattice antiferromagnets in the parameter space. It revealed a quantum phase transition between the triangular- and kagome-lattices at 1/3 of the saturation magnetization.
Tsutsui, Kenji; Toyama, Takami*; Maekawa, Sadamichi
JPS Conference Proceedings (Internet), 3, p.017008_1 - 017008_6, 2014/06
Impurity substitution for copper in high-Tc cuprate superconductors has attracted much attention. For Ni substitution, it has been argued from several experiments that hole carriers are strongly localized at around Ni sites. We have demonstrated theoretically that a hole can be bound in the NiO plaquette forming the Zhang-Rice doublet. In this study, we examine the interaction between the Zhang-Rice doublet and hole carriers. We carry out the numerically exact diagonalization on small clusters of the d-p model with a Ni impurity site and calculate the resonant inelastic X-ray scattering spectra for Ni K-edge.
Kubo, Katsunori
JPS Conference Proceedings (Internet), 3, p.011023_1 - 011023_6, 2014/06
Asai, Shinichiro*; Okazaki, Ryuji*; Terasaki, Ichiro*; Yasui, Yukio*; Igawa, Naoki; Kakurai, Kazuhisa
JPS Conference Proceedings (Internet), 3, p.014034_1 - 014034_6, 2014/06
We have carried out the neutron scattering measurements for a single crystal of LaCoRh
O
in order to investigate the ferromagnetic ordering induced by Rh
substitution for Co
of LaCoO
. The ordered moment is evaluated to be 0.4
0.2
, which is consistent with the saturation magnetization of LaCo
Rh
O
. It indicates that the ferromagnetic ordering of LaCo
Rh
O
originates from the short-range ferromagnetic ordering disordered by Rh
ions.
Sato, Kentaro*; Matsuura, Masato*; Fujita, Masaki*; Kajimoto, Ryoichi; Ji, S.*; Ikeuchi, Kazuhiko*; Nakamura, Mitsutaka; Inamura, Yasuhiro; Arai, Masatoshi; Enoki, Masanori*; et al.
JPS Conference Proceedings (Internet), 3, p.017010_1 - 017010_6, 2014/06
Gochi, Jun*; Sumiyama, Akihiko*; Yamaguchi, Akira*; Motoyama, Gaku*; Kimura, Noriaki*; Yamamoto, Etsuji; Haga, Yoshinori; Onuki, Yoshichika
JPS Conference Proceedings (Internet), 3, p.011067_1 - 011067_6, 2014/06
Araki, Shingo*; Hayashida, Minami*; Nishiumi, Naoto*; Manabe, Hiroki*; Ikeda, Yoichi*; Kobayashi, Tatsuo*; Murata, Keizo*; Inada, Yoshihiko*; Winiewski, P.*; Aoki, Dai*; et al.
JPS Conference Proceedings (Internet), 3, p.011081_1 - 011081_6, 2014/06