Fermi surface of three-dimensional La1-xSrxMnO3 explored by soft-X-ray ARPES: Rhombohedral lattice distortion and its effect on magnetoresistance
- Resource Type
- Working Paper
- Authors
- Lev, L. L.; Krempaský, J.; Staub, U.; Rogalev, V. A.; Schmitt, T.; Shi, M.; Blaha, P.; Mishchenko, A. S.; Veligzhanin, A. A.; Zubavichus, Y. V.; Tsetlin, M. B.; Volfová, H.; Braun, J.; Minár, J.; Strocov, V. N.
- Source
- Phys. Rev. Lett. 114 (2015)
- Subject
- Condensed Matter - Strongly Correlated Electrons
Condensed Matter - Materials Science
- Language
Electronic structure of the three-dimensional colossal magnetoresistive perovskite La1-xSrxMnO3 has been established using soft-X-ray ARPES with its intrinsically sharp definition of three-dimensional electron momentum. The experimental results show much weaker polaronic coupling compared to the bilayer manganites and are consistent with the GGA+U band structure. The experimental Fermi surface unveils the canonical topology of alternating three-dimensional electron spheres and hole cubes, with their shadow contours manifesting the rhombohedral lattice distortion. This picture has been confirmed by one-step photoemission calculations including displacement of the apical oxygen atoms. The rhombohedral distortion is neutral to the Jahn-Teller effect and thus polaronic coupling, but affects the double-exchange electron hopping and thus the colossal magnetoresistance effect.