Photoemission and x-ray absorption study of MgC1-xNi3

Article

关键词: ELECTRONIC-STRUCTURE;    SUPERCONDUCTIVITY;    FERROMAGNETISM;    SPECTROSCOPY;    TRANSITION;   

DOI  :  10.1103/PhysRevB.66.172507

来源: SCIE

【 摘 要 】

We investigated electronic structure of MgC1-xNi3 with photoemission and x-ray absorption spectroscopy. Both results show that overall band structure is in reasonable agreement with band structure calculations including the existence of von Hove singularity (vHs) near E-F. However, we find that the sharp vHs peak theoretically predicted near the E-F is substantially suppressed. As for the Ni core level and absorption spectrum, there exist the satellites of Ni 2p which have a little larger energy separation and reduced intensity compared to the case of Ni-metal. These facts indicate that correlation effects among Ni 3d electrons may be important to understand various physical properties.

【 授权许可】

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