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Okada, Koichi; Kondo, Keitaro; Ochiai, Kentaro; Sato, Satoshi; Konno, Chikara; Nishitani, Takeo; Nomura, Ken*; Okamoto, Atsushi*; Kitajima, Sumio*; Sasao, Mamiko*
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no abstracts in English
Matsuda, Masaaki; Wakimoto, Shuichi; Fujita, Masaki*; Yamada, Kazuyoshi*
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no abstracts in English
Yuri, Yosuke; Agematsu, Takashi; Arakawa, Kazuo; Ishibori, Ikuo; Kamiya, Tomihiro; Kashiwagi, Hirotsugu; Kurashima, Satoshi; Miyawaki, Nobumasa; Nara, Takayuki; Okumura, Susumu; et al.
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no abstracts in English
Sakai, Toru; Okamoto, Kiyomi*; Tonegawa, Takashi*
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no abstracts in English
Ikeuchi, Kazuhiko; Sato, Tomohiro; Ishii, Kenji; Inami, Toshiya; Mizuki, Junichiro; Bizen, Daisuke*; Murakami, Yoichi; Miyasaka, Shigeki*; Fujioka, Jun*; Tokura, Yoshinori*
no journal, ,
I will present resonant inelastic X-ray scattering measurements of the electric excitations in YVO with the incident energy of the K edge of vanadium at room temperature. We observed excitations corresponding to a Mott gap. We also performed the measurements of polarization dependence of the excitations. Remarkable change was observed on the Mott excitations about the measurements above the T of the orbital order.
Seo, Hitoshi; Okano, Yoshinori*; Ishibashi, Shoji*; Kobayashi, Hayao*; Fukuyama, Hidetoshi*; Kobayashi, Akiko*
no journal, ,
We investigate the electronic states of single component molecular conductors Ni(tmdt) and Au(tmdt). Starting from the intramolecular bonding/antibonding molecular orbitals which contributes to the levels near the Fermi energy, we contstruct an effective tight-binding model by decomposing them into orbitals of two (tmdt) and that of the metal. We discuss possible spin/charge ordered states within mean-field approximation and compare our results with the magnetic order found in Au(tmdt).
Yoneda, Yasuhiro; Yoshii, Kenji; Saito, Hiroyuki; Mizuki, Junichiro
no journal, ,
no abstracts in English
Ikeda, Takashi
no journal, ,
no abstracts in English
Xianglian*; Basar, K.*; Sainer, S.*; Ohara, Kota*; Sakuma, Takashi*; Takahashi, Haruyuki*; Igawa, Naoki; Ishii, Yoshinobu
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no abstracts in English
Kondoh, Takashi; Hayashi, Toshimitsu; Kawano, Yasunori; Kusama, Yoshinori; Sugie, Tatsuo
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no abstracts in English
Shibata, Kaoru; Takahashi, Nobuaki; Sato, Taku*; Kawakita, Yukinobu*; Nakajima, Kenji; Arai, Masatoshi; Mezei, F.*
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no abstracts in English
Takeda, Masayasu; Kakurai, Kazuhisa; Mibu, Ko*
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no abstracts in English
Hashimoto, Mie; Fukaya, Yuki; Kawasuso, Atsuo; Ichimiya, Ayahiko
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no abstracts in English
Tokunaga, Yo; Haga, Yoshinori; Sakai, Hironori; Kambe, Shinsaku; Homma, Yoshiya*; Aoki, Dai*; Fujimoto, Tatsuya; Ikeda, Shugo; Matsuda, Tatsuma; Yamamoto, Etsuji; et al.
no journal, ,
O NMR measurements have been performed on a series of the actinide dioxides, UO, NpO and PuO. Although the O NMR spectra in these materials are similar at higher temperatures, the low-temperature spectra present are significantly different. In UO we have observed a wide spectrum, forming a rectangular shape below =30 K. In NpO, on the other hand, the spectra broaden rather gradually and exhibit a two-peak structure below K. In PuO, neither spectrum broadening nor splitting has been observed. We show that these NMR spectra clearly indicate the different nature of the low-temperature magnetic ground states in these actinide compounds.
Fukaya, Yuki; Hashimoto, Mie; Kawasuso, Atsuo; Ichimiya, Ayahiko
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no abstracts in English
Kambe, Shinsaku; Sakai, Hironori; Tokunaga, Yo; Fujimoto, Tatsuya; Aoki, Dai*; Homma, Yoshiya*; Haga, Yoshinori; Walstedt, R. E.*; Onuki, Yoshichika*
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The ordered state of NpFeGa will be discussed. At T=116K, the first antiferromagnetic phase appears and the second one appears at T*=80K. The second phase is not clear in the present. We report Ga-NMR in this compound. NMR spectrum between T and T* is consistent with neutron scattering measurements which shows that the ordered vector is along the [110] direction with Q=(1/2,1/2,0). However, below T*, Ga (2) (4i site) site spectrum is spilitted due to a symmetry lowering. This cannot be explained with recent polarized neutron scattering study. The orederd phase below T* will be discussed.
Ishikawa, Masao; Itoga, Toshio*; Okuji, Toshio*; Baba, Mamoru*; Shinohara, Koji; Hayashi, Takao; Sukegawa, Atsuhiko
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no abstracts in English
Kakurai, Kazuhisa; Matsuda, Masaaki; Yoshii, Kenji; Ikeda, Naoshi*; Ishii, Yoshinobu; Kito, Hijiri*; Yamada, Yasusada*
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no abstracts in English
Sakai, Hironori; Kambe, Shinsaku; Tokunaga, Yo; Fujimoto, Tatsuya; Aoki, Dai*; Tokiwa, Yoshifumi*; Matsuda, Tatsuma; Yamamoto, Etsuji; Haga, Yoshinori; Onuki, Yoshichika*
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no abstracts in English
Kubo, Katsunori
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Orbital degree of freedom of electrons is an important ingredient to determine physical properties. In particular, effects of orbital degree of freedom on magnetism have been studied intensively. In recent years, superconductivity in systems with orbital degree of freedom has been studied, and some theoretical studies have been done for such materials. However, it is still important to study relatively simple models to grasp the role of orbital degree of freedom in superconductivity. For a pairing state composed of electrons with antisymmetrical orbital states, even-parity spin-triplet states such as an -wave triplet state and odd-parity spin-singlet states such as a -wave singlet state are possible. To investigate such exotic superconductivity, we apply fluctuation exchange approximation toan two-orbital Hubbard model on a square lattice. Then, we find that -wave triplet and -wave singlet states appears for a region where the electron number per site is around 1.