Quasiparticle Mass Enhancement and Temperature Dependence of the Electronic Structure of Ferromagnetic SrRuO3 Thin Films
Abstract
We report high-resolution angle-resolved photoemission studies of epitaxial thin films of the correlated 4d transition metal oxide ferromagnet SrRuO3. The Fermi surface in the ferromagnetic state consists of well-defined Landau quasiparticles exhibiting strong coupling to low-energy bosonic modes which contributes to the large effective masses observed by transport and thermodynamic measurements. Upon warming the material through its Curie temperature, we observe a substantial decrease in quasiparticle coherence but negligible changes in the ferromagnetic exchange splitting, suggesting that local moments play an important role in the ferromagnetism in SrRuO3.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 2013
- DOI:
- 10.1103/PhysRevLett.110.087004
- arXiv:
- arXiv:1211.2828
- Bibcode:
- 2013PhRvL.110h7004S
- Keywords:
-
- 74.25.Jb;
- 75.47.Lx;
- 79.60.-i;
- Electronic structure;
- Manganites;
- Photoemission and photoelectron spectra;
- Condensed Matter - Strongly Correlated Electrons;
- Condensed Matter - Materials Science
- E-Print:
- 5 pages, 4 figures, supplementary information (see other files)