Tuning the metal-insulator transition in NdNiO3 heterostructures via Fermi surface instability and spin-fluctuations

Abstract

We employed {\it in-situ} pulsed laser deposition (PLD) and angle-resolved photoemission spectroscopy (ARPES) to investigate the mechanism of the metal-insulator transition (MIT) in NdNiO${}_3$ (NNO) thin films, grown on NdGaO${}_3$(110) and LaAlO${}_3$(100) substrates. In the metallic phase, we observe three dimensional hole and electron Fermi surface (FS) pockets formed from strongly renormalized bands with well-defined quasiparticles. Upon cooling across the MIT in NNO/NGO sample, the quasiparticles lose coherence via a spectral weight transfer from near the Fermi level to localized states forming at higher binding energies. In the case of NNO/LAO, the bands are apparently shifted upward with an additional holelike pocket forming at the corner of the Brillouin zone. We find that the renormalization effects are strongly anisotropic and are stronger in NNO/NGO than NNO/LAO. Our study reveals that substrate-induced strain tunes the crystal field splitting, which changes the FS properties, nesting conditions, and spin-fluctuation strength, and thereby controls the MIT via the formation of an electronic order parameter with Q${}_{AF}\sim$(1/4, 1/4, 1/4$\pm$$\delta$).

submitted

References in corpus (6)

• Role of magnetic and orbital ordering at the metal-insulator transition in NdNiO3
• Tunable Charge and Spin Order in PrNiO${}_3$ Thin Films and Superlattices
• Fermi surfaces, electron-hole asymmetry and correlation kink in a three-dimensional Fermi liquid LaNiO${}_3$
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Cited by in corpus (5)

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• Electronic structure of buried LaNiO3 layers in (111)-oriented LaNiO3/LaMnO3 superlattices probed by soft x-ray ARPES
• Structural and transport properties of La${}_{1-x}$Sr${}_x$Co${}_{1-y}$Nb${}_y$O${}_3$ thin films