The role of structural distortions in triggering the metal to insulator transition in NdNiO3
Authors:
- Mariana GomesMGMariana Gomes
- Manjunath BalagopalanMBManjunath Balagopalan
- Rui VilarinhoRui Vilarinho
- Abderrazzak Ait BassouABAbderrazzak Ait Bassou
- Bruna SilvaBSBruna Silva
- Bernardo AlmeidaBABernardo Almeida
- Abílio AlmeidaAAAbílio Almeida
- Jens KreiselJKJens Kreisel
- Pedro TavaresPedro Tavares
- Jorge ÍñiguezJÍJorge Íñiguez
- Joaquim MoreiraJoaquim Moreira
Preprint
- 20 February 2023
- preprint
- Published by Springer Nature in Research Square
Abstract
The role of the structural distortions on the metal to insulator transition (MIT) of NdNiO3 is still a controversial topic. NdNiO3 ceramic, 260 nm and 110 nm thin films deposited onto (001)-oriented LaAlO3 substrates were studied to unravel the effect of structural symmetry breaking on the electronic phase transition. Resistivity measurements evidence the coexistence of metallic and insulating states below the TMI, while magnetization measurements confirm the expected TMI = TN for all samples. The structural symmetry was investigated across the MIT, through Raman scattering spectroscopy, with the orthorhombic Pnma phase being found at high temperatures, but the emergence of the monoclinic P21/n phase only occurring well below TMI, which is an unexpected experimental result since the structural transition has been understood as a necessary trigger for the MIT. These experimental results, which are noticeably independent of the sample type/quality, imply a temperature difference between the structural and electronic/magnetic ordering, thus contrasting with current theoretical models.Keywords
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This publication has 27 references indexed in Scilit:
- Thermal stability and decomposition kinetics of NdNiO3−δ at 1 bar of O2Materials Today Communications, 2021
- From hidden metal-insulator transition to Planckian-like dissipation by tuning the oxygen content in a nickelatenpj Quantum Materials, 2021
- Tunable resistivity exponents in the metallic phase of epitaxial nickelatesNature Communications, 2020
- Direct Mapping of Phase Separation across the Metal–Insulator Transition of NdNiO3Nano Letters, 2018
- Structurally triggered metal-insulator transition in rare-earth nickelatesNature Communications, 2017
- Influence of tensile-strain-induced oxygen deficiency on metal-insulator transitions in NdNiO3−δ epitaxial thin filmsScientific Reports, 2017
- Complete phase diagram of rare-earth nickelates from first-principlesnpj Quantum Materials, 2017
- Metal-insulator transition in epitaxial NdNiO 3 thin film: A structural, electrical and optical studyApplied Surface Science, 2017
- Striped nanoscale phase separation at the metal–insulator transition of heteroepitaxial nickelatesNature Communications, 2016
- Oxygen nonstoichiometry of NdNiO3−δ and SmNiO3−δMaterials Research Bulletin, 2004