Electronic structure of buried LaNiO3 layers in (111)-oriented LaNiO3/LaMnO3 superlattices probed by soft x-ray ARPES

F. Y. Bruno; M. Gibert; S. McKeown Walker; O. E. Peil; A. de la Torre; S. Riccò; Z. Wang; S. Catalano; A. Tamai; F. Bisti; V. N. Strocov; J.-M. Triscone; F. Baumberger

doi:10.1063/1.4973558

APL Materials (Jan 2017)

Electronic structure of buried LaNiO3 layers in (111)-oriented LaNiO3/LaMnO3 superlattices probed by soft x-ray ARPES

F. Y. Bruno,
M. Gibert,
S. McKeown Walker,
O. E. Peil,
A. de la Torre,
S. Riccò,
Z. Wang,
S. Catalano,
A. Tamai,
F. Bisti,
V. N. Strocov,
J.-M. Triscone,
F. Baumberger

Affiliations

F. Y. Bruno: Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
M. Gibert: Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
S. McKeown Walker: Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
O. E. Peil: Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
A. de la Torre: Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
S. Riccò: Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
Z. Wang: Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
S. Catalano: Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
A. Tamai: Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
F. Bisti: Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
V. N. Strocov: Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
J.-M. Triscone: Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
F. Baumberger: Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland

DOI: https://doi.org/10.1063/1.4973558
Journal volume & issue: Vol. 5, no. 1
pp. 016101 – 016101-7

Abstract

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Taking advantage of the large electron escape depth of soft x-ray angle resolved photoemission spectroscopy, we report electronic structure measurements of (111)-oriented [LaNiO3/LaMnO3] superlattices and LaNiO3 epitaxial films. For thin films, we observe a 3D Fermi surface with an electron pocket at the Brillouin zone center and hole pockets at the zone vertices. Superlattices with thick nickelate layers present a similar electronic structure. However, as the thickness of the LaNiO3 is reduced, the superlattices become insulating. These heterostructures do not show a marked redistribution of spectral weight in momentum space but exhibit a pseudogap of ≈50 meV.

Published in APL Materials

ISSN: 2166-532X (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Technology: Chemical technology: Biotechnology; Science: Physics
Website: http://aplmaterials.aip.org

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