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Electronic Structures of CeM2Al10 (M = Fe, Ru, and Os) Studied by Soft X-ray Resonant and High-Resolution Photoemission Spectroscopies.
- Source :
- Journal of the Physical Society of Japan; 2014, Vol. 83 Issue 9, p094717-1-094717-6, 6p
- Publication Year :
- 2014
-
Abstract
- We have performed a photoemission spectroscopy (PES) study of CeM<subscript>2</subscript>Al<subscript>10</subscript> (M = Fe, Ru, and Os) to directly observe the electronic structure involved in the unusual magnetic ordering. Soft X-ray resonant (SXR) PES provides spectroscopic evidence of the hybridization between conduction and Ce 4/electrons (c-f hybridization) and the order of the hybridization strength (Ru < Os < Fe). High-resolution (HR) PES of CeRu<subscript>2</subscript>Al<subscript>10</subscript> and CeOs<subscript>2</subscript>Al<subscript>10</subscript>, as compared with that of CeFe<subscript>2</subscript>Al<subscript>10</subscript>, identifies two structures that can be ascribed to structures induced by the c-f hybridization and the antiferromagnetic ordering, respectively. Although the c-f hybridization-induced structure is a depletion of the spectral intensity (pseudogap) around the Fermi level (E<subscript>F</subscript>) with an energy scale of 20-30 meV, the structure related to the antiferromagnetic ordering is observed as a shoulder at approximately 10-11 meV within the pseudogap. The energies of the shoulder structures of CeR<subscript>2</subscript>Al<subscript>10</subscript> and CeOs<subscript>2</subscript>Al<subscript>10</subscript> are approximately half of the optical gap (20meV), indicating that E<subscript>F</subscript> is located at the midpoint of the gap. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00319015
- Volume :
- 83
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Journal of the Physical Society of Japan
- Publication Type :
- Academic Journal
- Accession number :
- 98654818
- Full Text :
- https://doi.org/10.7566/JPSJ.83.094717