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Superconducting and Structural Transitions in the β-Pyrochlore Oxide KOs2O6 under High Pressure
Hiroki Ogusu, Nao Takeshita, Koichi Izawa +5
Rattling-induced superconductivity in the β-pyrochlore oxide KOs2O6 is investigated under high pressure up to 5 GPa. Resistivity measurements in a high-quality single crystal revea…
Thermodynamic Properties of the Kagome Lattice in Volborthite
Satoshi Yamashita, Tomoya Moriura, Yasuhiro Nakazawa +3
Thermodynamic investigations on volborthite (Cu3V2O7(OH)2 2H2O), which possesses a two-dimensional kagome structure of S-1/2 spins, are presented. The low-temperature heat capaciti…
Itinerant-Electron Magnet of the Pyrochlore Lattice: Indium-Doped YMn2Zn20
Yoshihiko Okamoto, Takeshi Shimizu, Jun-ichi Yamaura +2
We report on a ternary intermetallic compound, "YMn2Zn20", comprising a pyrochlore lattice made of Mn atoms. A series of In-doped single crystals undergo no magnetic long-range ord…
Discontinuous Lifshitz Transition Achieved by Band-Filling Control in NaxCoO2
Yoshihiko Okamoto, Atsushi Nishio, Zenji Hiroi
Precise band-filling control is performed on a strongly correlated electron system NaxCoO2, by changing the Na content, and the influence of this on the magnetic and thermodynamic…