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

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

Dhaka, R. S.  
•
Das, Tanmoy
•
Plumb, N. C.
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2015
Physical Review B

We employed in situ pulsed laser deposition (PLD) and angle-resolved photoemission spectroscopy (ARPES) to investigate the mechanism of the metal-insulator transition (MIT) in NdNiO3 (NNO) thin films, grown on NdGaO3(110) and LaAlO3(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 QAF similar to (1/4,1/4,1/4 +/- delta).

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Type
research article
DOI
10.1103/PhysRevB.92.035127
Web of Science ID

WOS:000357856900001

Author(s)
Dhaka, R. S.  
Das, Tanmoy
Plumb, N. C.
Ristic, Z.  
Kong, W.
Matt, C. E.
Xu, N.
Dolui, Kapildeb
Razzoli, E.
Medarde, M.
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Date Issued

2015

Publisher

Amer Physical Soc

Published in
Physical Review B
Volume

92

Issue

3

Article Number

035127

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSNS  
Available on Infoscience
September 28, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/118940
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