Sensitivity of Electronic Structure to Crystal Distortions in Infinite-Layered LaNiO2

Published

January 23, 2025

Author(s)

S. Rathnayaka, S. Yano, J. B. Moree, K. Kawashima, J. Akimitsu, Craig Brown, J. Neuefeind, D. Louca

Abstract

Recent observations of unconventional superconductivity (SC) in thin films of LaNiO2 (critical temperature Tc  10 K) and in bulk single crystals of La3Ni2O7 under pressure Tc  80K have cemented a long sought-after class of SC nickelates. In La1−xSrxNiO2, SC appears only in films for reasons not understood. We perform a combination of experiments to probe the crystal structure and magnetic order in bulk LaNiO2 together with ab initio calculations of the electronic structure. We find that the infinite layers are naturally buckled out-of-plane. The electronic bands are largely unaffected by the buckling, but uniaxial compression along the c axis may lead to a Lifshitz transition.

Citation

Physical Review B

Volume

111

Issue

1

Pub Type

Journals

Download Paper

https://doi.org/10.1103/PhysRevB.111.014518

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Keywords

superconductivity, nicklate, neutron diffraction

Citation

Rathnayaka, S. , Yano, S. , Moree, J. , Kawashima, K. , Akimitsu, J. , Brown, C. , Neuefeind, J. and Louca, D. (2025), Sensitivity of Electronic Structure to Crystal Distortions in Infinite-Layered LaNiO2, Physical Review B, [online], https://doi.org/10.1103/PhysRevB.111.014518, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=957643 (Accessed July 23, 2025)