Emergent antiferromagnetism of YTiO3 in YTiO3-CaTiO3 superlattices
P. Pal, X. Liu, M. Kareev, D. Choudhury, and J. Chakhalian
TL;DR
This study investigates emergent antiferromagnetic order in ultra-thin YTiO3 layers within YTiO3-CaTiO3 superlattices, revealing novel magnetic phenomena consistent with recent theoretical predictions.
Contribution
It provides experimental evidence of antiferromagnetism in YTiO3 superlattices, a phenomenon predicted but not previously observed.
Findings
Observation of low-temperature resistance upturns
Detection of non-Fermi liquid transport behavior
Identification of positive magnetoresistance
Abstract
Transport and magnetoresistance measurements are performed on metallic, high-carrier density YTiO3-CaTiO3 superlattices as a probe towards the investigation of an emergent magnetic order of YTiO3. On varying the thickness of YTiO3 while keeping the CaTiO3 layer thickness constant in the superlattices, a low-temperature upturn in sheet-resistance, a non-Fermi liquid-like charge transport and positive magnetoresistance are observed. Analyses of the origin of such effects suggest that a unique antiferromagnetic order is realized in the ultra-thin, epitaxially strained YTiO3 layers, which corroborates well with some recent theoretical predictions in this regard.
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