Electronic structure of MnSi: The role of electron-electron interactions
Abstract
We present an experimental study of the electronic structure of MnSi. Using x-ray absorption spectroscopy (XAS), x-ray photoemission, and x-ray fluorescence, we provide experimental evidence that MnSi has a mixed valence ground state. We show that self-consistent local density approximation supercell calculations cannot replicate the XAS spectra of MnSi, while a good match is achieved within the atomic multiplet theory assuming a mixed valence ground state. We discuss the role of the electron-electron interactions in this compound and estimate that the valence fluctuations are suppressed by a factor of 2.5, which means that the Coulomb repulsion is not negligible.
- Publication:
-
Physical Review B
- Pub Date:
- February 2006
- DOI:
- 10.1103/PhysRevB.73.085114
- Bibcode:
- 2006PhRvB..73h5114C
- Keywords:
-
- 71.27.+a;
- 75.25.+z;
- 75.10.-b;
- 78.70.Dm;
- Strongly correlated electron systems;
- heavy fermions;
- Spin arrangements in magnetically ordered materials;
- General theory and models of magnetic ordering;
- X-ray absorption spectra