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Journal Articles

Spin gap in Tl$$_2$$Ru$$_2$$O$$_7$$ and the possible formation of Haldane chains in three-dimensional crystals

Lee, S.*; Park, J.-G.*; Adroja, D. T.*; Khomskii, D.*; Streltsov, S.*; McEwen, K. A.*; Sakai, Hironori; Yoshimura, Kazuyoshi*; Anisimov, V. I.*; Mori, Daisuke*; et al.

Nature Materials, 5(6), p.471 - 476, 2006/06

 Times Cited Count:101 Percentile:94.64(Chemistry, Physical)

Here we show that the three-dimensional cubic system of Tl$$_2$$Ru$$_2$$O$$_7$$ most probably evolves into a one-dimensional spin-one Haldane system with a spin gap below 120 K, accompanied by anomalies in the structure, resistivity, and susceptibility. We argue that these anomalies are due to an orbital ordering of Ru $$4d$$ electrons, with a strong coupling among three degrees of freedom: orbital, spin, and lattice. Our work provides a unique example of the spontaneous formation of Haldane system with an insight into the intriguing interplay of different degrees of freedom.

Journal Articles

Higher-order collinear interaction and magnetic excitation in the 5f localized system U$$_{3}$$Pd$$_{20}$$Si$$_{6}$$

Metoki, Naoto; Koike, Yoshihiro; Haga, Yoshinori; Kaneko, Koji; Araki, Shingo; McEwen, K. A.*; Kogi, Masafumi*; Aso, Naofumi*; Lander, G. H.; Komatsubara, Takemi*; et al.

Journal of Physics; Condensed Matter, 15(28), p.S1957 - S1963, 2003/07

 Times Cited Count:2 Percentile:15.73(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Magnetic structure, phase diagram, and a new type of spin-flop transition dominated by higher order interaction in a localized 5$$f$$ system U$$_{3}$$Pd$$_{20}$$Si$$_{6}$$

Koike, Yoshihiro; Metoki, Naoto; Haga, Yoshinori; McEwen, K. A.*; Kogi, Masafumi*; Yamamoto, Ryunosuke*; Aso, Naofumi*; Tateiwa, Naoyuki*; Komatsubara, Takemi*; Kimura, Noriaki*; et al.

Physical Review Letters, 89(7), p.077202_1 - 077202_4, 2002/08

 Times Cited Count:7 Percentile:48.12(Physics, Multidisciplinary)

no abstracts in English

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