Electronic Band Structure and Fermi Surface of CaB6 Studied by Angle-Resolved Photoemission Spectroscopy
Abstract
We report high-resolution angle-resolved photoemission spectroscopy (ARPES) on CaB6. The band structure determined by ARPES shows a 1eV energy gap at the X point between the valence and the conduction bands. We found a small electron pocket at the X point, whose carrier number is estimated to be (4 5)×1019 cm-3, in good agreement with the Hall resistivity measurement with the same crystal. The experimental results are discussed in comparison with band structure calculations and theoretical models for the high-temperature ferromagnetism.
- Publication:
-
Physical Review Letters
- Pub Date:
- January 2003
- DOI:
- 10.1103/PhysRevLett.90.027202
- Bibcode:
- 2003PhRvL..90b7202S
- Keywords:
-
- 75.50.Cc;
- 71.18.+y;
- 71.20.-b;
- 79.60.Bm;
- Other ferromagnetic metals and alloys;
- Fermi surface: calculations and measurements;
- effective mass g factor;
- Electron density of states and band structure of crystalline solids;
- Clean metal semiconductor and insulator surfaces