Fermi Surface of Three-Dimensional La(1-x)Sr(x)MnO3 Explored by Soft-X-Ray ARPES: Rhombohedral Lattice Distortion and its Effect on Magnetoresistance.
- Lev LL Swiss Light Source, Paul Scherrer Institute, 5232 Villigen, Switzerland.
- Krempaský J Swiss Light Source, Paul Scherrer Institute, 5232 Villigen, Switzerland.
- Staub U Swiss Light Source, Paul Scherrer Institute, 5232 Villigen, Switzerland.
- Rogalev VA Swiss Light Source, Paul Scherrer Institute, 5232 Villigen, Switzerland.
- Schmitt T Swiss Light Source, Paul Scherrer Institute, 5232 Villigen, Switzerland.
- Shi M Swiss Light Source, Paul Scherrer Institute, 5232 Villigen, Switzerland.
- Blaha P Institut für Materialchemie, Technische Universität Wien, A-1060 Wien, Austria.
- Mishchenko AS National Research Centre "Kurchatov Institute", 123182 Moscow, Russia.
- Veligzhanin AA National Research Centre "Kurchatov Institute", 123182 Moscow, Russia.
- Zubavichus YV National Research Centre "Kurchatov Institute", 123182 Moscow, Russia.
- Tsetlin MB National Research Centre "Kurchatov Institute", 123182 Moscow, Russia.
- Volfová H Department Chemie, Ludwig-Maximilians-Universität München, 81377 Munich, Germany.
- Braun J Department Chemie, Ludwig-Maximilians-Universität München, 81377 Munich, Germany.
- Minár J Department Chemie, Ludwig-Maximilians-Universität München, 81377 Munich, Germany.
- Strocov VN Swiss Light Source, Paul Scherrer Institute, 5232 Villigen, Switzerland.
- 2015-07-22
Published in:
- Physical review letters. - 2015
English
Electronic structure of the three-dimensional colossal magnetoresistive perovskite La(1-x)Sr(x)MnO3 has been established using soft-x-ray angle-resolved photoemission spectroscopy 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 theoretical band structure including the empirical Hubbard parameter U. 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.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevLett.114.237601
- PMID 26196827
- Persistent URL
- https://sonar.ch/global/documents/797
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