Tuning the metal-insulator transition in ${\mathrm{NdNiO}}_{3}$ heterostructures via Fermi surface instability and spin fluctuations

Dhaka, R. S.; Das, Tanmoy; Plumb, N. C.; Ristic, Z.; Kong, W.; Matt, C. E.; Xu, N.; Dolui, Kapildeb; Razzoli, Elia; Medarde, M.; Patthey, L.; Shi, M.; Radović, M.; Mesot, Joël

doi:10.1103/PhysRevB.92.035127

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Tuning the metal-insulator transition in ${\mathrm{NdNiO}}_{3}$ heterostructures via Fermi surface instability and spin fluctuations

Dhaka, R. S. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland - Institute of Condensed Matter Physics, EPFL, Lausanne, Switzerland - Department of Physics, Indian Institute of Technology Delhi, New Delhi, India
Das, Tanmoy Department of Physics, Indian Institute of Science, Bangalore, India. - Department of Physics, National University of Singapore, Singapore
Plumb, N. C. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland
Ristic, Z. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland - Institute of Condensed Matter Physics, EPFL, Lausanne, Switzerland
Kong, W. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland - Institute of Physics, Chinese Academy of Sciences, Beijing, China
Matt, C. E. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland - Laboratory for Solid State Physics, ETH Zürich, Switzerland
Xu, N. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland
Dolui, Kapildeb Department of Physics, National University of Singapore, Singapore
Razzoli, Elia Department of Physics, University of Fribourg, Switzerland
Medarde, M. Laboratory for Developments and Methods, Paul Scherrer Institut, Villigen PSI, Switzerland
Patthey, L. SwissFEL, Paul Scherrer Institute, Villigen PSI, Switzerland
Shi, M. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland
Radović, M. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland - SwissFEL, Paul Scherrer Institute, Villigen PSI, Switzerland
Mesot, Joël Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland - Institute of Condensed Matter Physics, EPFL, Lausanne, Switzerland - Laboratory for Solid State Physics, ETH Zürich, Switzerland

14.07.2015

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Physical Review B. - 2015, vol. 92, no. 3, p. 035127

English 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∼(1/4,1/4,1/4±δ).

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

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