Author/Authors :
Sekiyama، نويسنده , , A. and Suga، نويسنده , , S. and Ueda، نويسنده , , S. and Imada، نويسنده , , S. and Matsuda، نويسنده , , Thomas K. and Iwasaki، نويسنده , , T. and Hedo، نويسنده , , M. and Yamamoto، نويسنده , , E. and Haga، نويسنده , , Y. and Onuki، نويسنده , , Y. and Saitoh، نويسنده , , Y. and Matsushita، نويسنده , , T. and Nakatani، نويسنده , , T. and Kotsugi، نويسنده , , M. and Tanaka، نويسنده , , S. and Harima، نويسنده , , H.، نويسنده ,
Abstract :
Bulk Ce 4f and Ru 4d spectral functions of strongly valence-fluctuating CeRu2 are revealed by Ce 3d–4f resonance photoemission with unprecedented resolution (∼100 meV at hν∼880 eV). The experimental spectra revealed that the Ce 4f states are itinerant and beyond the treatment of the single impurity Anderson model. Bulk Ru 4d states are found to be different from the surface states, implying that even the valence-band structure is modified by such a strong hybridization effect in the bulk. The controversy on the photoemission spectral shapes of Ce materials with very high Kondo temperature is now settled.
