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Novel Features Realized in the Filled Skutterudite Structure

2008; Physical Society of Japan; Volume: 77; Issue: Suppl.A Linguagem: Inglês

10.1143/jpsjs.77sa.1

1347-4073

Hideyuki Sato, Daisuke Kikuchi, Kenya Tanaka, Makoto Ueda, Hidekazu Aoki, Tsuyoshi Ikeno, Sho Tatsuoka, Keitaro Kuwahara, Yuji Aoki, M. Kohgi, Hitoshi Sugawara, Kazuaki Iwasa, Hisatomo Harima,

Physics of Superconductivity and Magnetism

Full varieties of strongly correlated electron phenomena have been found in the filled skutterudite systems, by changing the constituent elements. The unique crystal structure leads to novel features even in the systems containing rare earth elements with plural number of 4 f -electrons. According to the intensive competitions and cooperation among experimental and theoretical research works, remarkable progress has been made in sorting out several basic origins that bring about the variety of this system, such as the strong c – f hybridization, the small CEF level splitting, the orbital degree of freedom (multipoles), and the positional degree of freedom within a pnictogen cage. However, there still remain many attractive questions to be answered.