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Photoemission spectroscopy and X-ray absorption spectroscopy studies of the superconducting pyrochlore oxide Cd$$_{2}$$Re$$_{2}$$O$$_{7}$$

Irizawa, Akinori*; Higashiya, Atsushi*; Kasai, Shuichi*; Sasabayashi, Takehisa*; Shigemoto, Akihiko*; Sekiyama, Akira*; Imada, Shin*; Suga, Shigemasa*; Sakai, Hironori   ; Ono, Hiroyuki*; Kato, Masaki*; Yoshimura, Kazuyoshi*; Harima, Hisatomo*

Photoemission spectroscopy (PES) and O $$1s$$ X-ray absorption spectroscopy (XAS) measurements have been performed for Cd$$_2$$ Re$$_2$$ O$$_7$$ single crystals. Temperature variations of their spectra reveal that the phase transition at 120 K directly changes the band structure near the Fermi level compared with another transition near 200 K. The roles of the transitions are discussed in terms of the changes in the Re-O orbital hybridization.



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Category:Physics, Multidisciplinary



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