Journal
PHYSICAL REVIEW B
Volume 83, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.161102
Keywords
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Funding
- DOD-ARO [0402-17291]
- NSF [DMR-0747808]
- US Department of Energy, Office of Science [DEAC02-06CH11357]
- US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-FG02-03ER46097]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [747808] Funding Source: National Science Foundation
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We investigate the electronic reconstruction in (LaNiO3)(n)/(LaAlO3)(3) (n = 3, 5, and 10) superlattices due to the quantum confinement (QC) by dc transport and resonant soft x-ray absorption spectroscopy. In proximity to the QC limit, a Mott-type transition from an itinerant electron behavior to a localized state is observed. The system exhibits tendency toward charge-order during the transition. Ab initio cluster calculations are in good agreement with the absorption spectra, indicating that the apical ligand hole density is highly suppressed, resulting in a strong modification of the electronic structure. At the dimensional crossover cellular dynamical-mean-field calculations support the emergence of a Mott insulator ground state in the heterostructured ultrathin slab of LaNiO3.
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