Breathing distortions in the metallic, antiferromagnetic phase of  LaNiO$_3$

Subedi, Alaska

doi:10.21468/scipostphys.5.3.020

Cited by 12 publications

(6 citation statements)

References 65 publications

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“…A similar observation was made earlier in Ref. 49. In this structure, there are two P derived sites with energies as close as 20 meV when occupied by Li + .…”

Section: Discussionsupporting

confidence: 89%

Local metallic and structural properties of the strongly correlated metal LaNiO3 using 8Li β–NMR

et al. 2019

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We report β-detected NMR of ion-implanted 8 Li in a single crystal and thin film of the strongly correlated metal LaNiO 3 . In both samples, spin-lattice relaxation measurements reveal two distinct local metallic environments, as is evident from T-linear Korringa 1/T 1 below 200 K with slopes comparable to other metals. A small, approximately temperature independent Knight shift of ∼74 ppm is observed, yielding a normalized Korringa product characteristic of substantial antiferromagnetic correlations, but, we find no evidence for a magnetic transition from 4 to 310 K. Two distinct, equally abundant 8 Li sites is inconsistent with the widely accepted rhombohedral structure of LaNiO 3 , but cannot be simply explained by either of the common alternative orthorhombic or monoclinic distortions. arXiv:1906.07878v1 [cond-mat.str-el]

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“…A similar observation was made earlier in Ref. 49. In this structure, there are two P derived sites with energies as close as 20 meV when occupied by Li + .…”

Section: Discussionsupporting

confidence: 89%

Local metallic and structural properties of the strongly correlated metal LaNiO3 using 8Li β–NMR

et al. 2019

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“…Nevertheless, with the charge order effects being so weak, one could infer that LaNiO 3 is perhaps better described using Fermi surface arguments [7,28] while the other insulating nickelates RNiO 3 with the smaller R-ionic sizes and with higher charge ordering temperatures can be more intuitively understood in terms of local charge or bond disproportionations [5,6,8,9,11,12]. Note, that recent ab-initio calculations [32] reproduced metallic and antiferromagnetic state of LaNiO 3 , and also predicted charge (or rather bond) disproportionation, whose magnitude is however below our experimental detection limit. One needs special dedicated experiments to probe for the eventual symmetry lowering with the appearance of inequivalent Ni ions.…”

Section: Discussionmentioning

confidence: 99%

Antiferromagnetic correlations in the metallic strongly correlated transition metal oxide LaNiO3

et al. 2018

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The material class of rare earth nickelates with high Ni3+ oxidation state is generating continued interest due to the occurrence of a metal-insulator transition with charge order and the appearance of non-collinear magnetic phases within this insulating regime. The recent theoretical prediction for superconductivity in LaNiO3 thin films has also triggered intensive research efforts. LaNiO3 seems to be the only rare earth nickelate that stays metallic and paramagnetic down to lowest temperatures. So far, centimeter-sized impurity-free single crystal growth has not been reported for the rare earth nickelates material class since elevated oxygen pressures are required for their synthesis. Here, we report on the successful growth of centimeter-sized LaNiO3 single crystals by the floating zone technique at oxygen pressures of up to 150 bar. Our crystals are essentially free from Ni2+ impurities and exhibit metallic properties together with an unexpected but clear antiferromagnetic transition.

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“…LaNiO 3 (LNO), with the largest Re cation, is the only Re-NiO 3 nickelate that is metallic down to the lowest temperatures. LNO is a correlated metal 8 and it has long been suspected that the properties of LNO are influenced by its proximity to magnetic and structural instabilities 9,10 , perhaps even by quantum fluctuations resulting from these instabilities 11,12 . However, clear experimental evidence for the effect of quantum fluctuations at low temperatures has not been reported in LNO until now.…”

Section: Introductionmentioning

confidence: 99%

Observation of an antiferromagnetic quantum critical point in high-purity LaNiO3

et al. 2020

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Amongst the rare-earth perovskite nickelates, LaNiO 3 (LNO) is an exception. While the former have insulating and antiferromagnetic ground states, LNO remains metallic and non-magnetic down to the lowest temperatures. It is believed that LNO is a strange metal, on the verge of an antiferromagnetic instability. Our work suggests that LNO is a quantum critical metal, close to an antiferromagnetic quantum critical point (QCP). The QCP behavior in LNO is manifested in epitaxial thin films with unprecedented high purities. We find that the temperature and magnetic field dependences of the resistivity of LNO at low temperatures are consistent with scatterings of charge carriers from weak disorder and quantum fluctuations of an antiferromagnetic nature. Furthermore, we find that the introduction of a small concentration of magnetic impurities qualitatively changes the magnetotransport properties of LNO, resembling that found in some heavy-fermion Kondo lattice systems in the vicinity of an antiferromagnetic QCP.

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Breathing distortions in the metallic, antiferromagnetic phase of LaNiO$_3$

Cited by 12 publications

References 65 publications

Local metallic and structural properties of the strongly correlated metal LaNiO3 using 8Li β–NMR

Local metallic and structural properties of the strongly correlated metal LaNiO3 using 8Li β–NMR

Antiferromagnetic correlations in the metallic strongly correlated transition metal oxide LaNiO3

Observation of an antiferromagnetic quantum critical point in high-purity LaNiO3

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