Journal Article

PUBDB-2024-05947

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Emergence of Interfacial Magnetism in Strongly‐Correlated Nickelate‐Titanate Superlattices

Asmara, T. C. (Corresponding author)Extern*XFEL.EU* ; Green, R. J. ; Suter, A. ; Wei, Y. ; Zhang, W. ; Knez, D. ; Harris, G. ; Tseng, Y. ; Yu, T. ; Betto, D. ; Garcia-Fernandez, M. ; Agrestini, S. ; Klein, Y. M. ; Kumar, N. ; Galdino, C. W. ; Salman, Z. ; Prokscha, T. ; Medarde, M. ; Müller, E. ; Soh, Y. ; Brookes, N. B. ; Zhou, K.-J. ; Radovic, M. ; Schmitt, T.

2024
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/adma.202310668  doi:10.3204/PUBDB-2024-05947

Abstract: Strongly-correlated transition-metal oxides are widely known for their variousexotic phenomena. This is exemplified by rare-earth nickelates such asLaNiO3 , which possess intimate interconnections between their electronic,spin, and lattice degrees of freedom. Their properties can be further enhancedby pairing them in hybrid heterostructures, which can lead to hidden phasesand emergent phenomena. An important example is the LaNiO$_3$ /LaTiO$_3$ superlattice, where an interlayer electron transfer has been observed fromLaTiO$_3$ into LaNiO$_3$ leading to a high-spin state. However, macroscopicemergence of magnetic order associated with this high-spin state has so farnot been observed. Here, by using muon spin rotation, x-ray absorption, andresonant inelastic x-ray scattering, direct evidence of an emergentantiferromagnetic order with high magnon energy and exchange interactionsat the LaNiO3 /LaTiO$_3$ interface is presented. As the magnetism is purelyinterfacial, a single LaNiO$_3$/LaTiO$_3$ interface can essentially behave as anatomically thin strongly-correlated quasi-2D antiferromagnet, potentiallyallowing its technological utilization in advanced spintronic devices.Furthermore, its strong quasi-2D magnetic correlations, orbitally-polarizedplanar ligand holes, and layered superlattice design make its electronic,magnetic, and lattice configurations resemble the precursor states ofsuperconducting cuprates and nickelates, but with an S→1 spin state instead.

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Contributing Institute(s):

1. SCS (XFEL_E2_SCS)

Research Program(s):

1. 6G13 - Accelerator of European XFEL (POF4-6G13) (POF4-6G13)

Experiment(s):

1. Experiments at XFEL

Appears in the scientific report 2024

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Essential Science Indicators ; IF >= 25 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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