Scholars@Duke

Gaps and pseudogaps in perovskite rare earth nickelates

Publication ,  Journal Article
Allen, SJ; Hauser, AJ; Mikheev, E; Zhang, JY; Moreno, NE; Son, J; Ouellette, DG; Kally, J; Kozhanov, A; Balents, L; Stemmer, S
Published in: APL Materials
June 1, 2015
Published version (DOI)

We report on tunneling measurements that reveal the evolution of the quasiparticle state density in two rare earth perovskite nickelates, NdNiO3 and LaNiO3, that are close to a bandwidth controlled metal to insulator transition. We measure the opening of a sharp gap of ∼30 meV in NdNiO3 in its insulating ground state. LaNiO3, which remains a correlated metal at all practical temperatures, exhibits a pseudogap of the same order. The results point to both types of gaps arising from a common origin, namely, a quantum critical point associated with the T = 0 K metal-insulator transition. The results support theoretical models of the quantum phase transition in terms of spin and charge instabilities of an itinerant Fermi surface.

Duke Scholars

Alexander Y. Kozhanov
Author Alexander Y. Kozhanov Electrical and Computer Engineering

Published In

APL Materials

DOI

10.1063/1.4907771

EISSN

2166-532X

Publication Date

June 1, 2015

Volume

3

Issue

6

Related Subject Headings

  • 5104 Condensed matter physics
  • 4018 Nanotechnology
  • 4016 Materials engineering
  • 0913 Mechanical Engineering
  • 0912 Materials Engineering
  • 0906 Electrical and Electronic Engineering
 

Citation

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Allen, S. J., Hauser, A. J., Mikheev, E., Zhang, J. Y., Moreno, N. E., Son, J., … Stemmer, S. (2015). Gaps and pseudogaps in perovskite rare earth nickelates. APL Materials, 3(6). https://doi.org/10.1063/1.4907771
Allen, S. J., A. J. Hauser, E. Mikheev, J. Y. Zhang, N. E. Moreno, J. Son, D. G. Ouellette, et al. “Gaps and pseudogaps in perovskite rare earth nickelates.” APL Materials 3, no. 6 (June 1, 2015). https://doi.org/10.1063/1.4907771.
Allen SJ, Hauser AJ, Mikheev E, Zhang JY, Moreno NE, Son J, et al. Gaps and pseudogaps in perovskite rare earth nickelates. APL Materials. 2015 Jun 1;3(6).
Allen, S. J., et al. “Gaps and pseudogaps in perovskite rare earth nickelates.” APL Materials, vol. 3, no. 6, June 2015. Scopus, doi:10.1063/1.4907771.
Allen SJ, Hauser AJ, Mikheev E, Zhang JY, Moreno NE, Son J, Ouellette DG, Kally J, Kozhanov A, Balents L, Stemmer S. Gaps and pseudogaps in perovskite rare earth nickelates. APL Materials. 2015 Jun 1;3(6).

Published In

APL Materials

DOI

10.1063/1.4907771

EISSN

2166-532X

Publication Date

June 1, 2015

Volume

3

Issue

6

Related Subject Headings

  • 5104 Condensed matter physics
  • 4018 Nanotechnology
  • 4016 Materials engineering
  • 0913 Mechanical Engineering
  • 0912 Materials Engineering
  • 0906 Electrical and Electronic Engineering