Insulator-to-metal crossover near the edge of the superconducting dome in Nd1-xSrxNiO2

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

4 Scopus Citations
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Author(s)

  • Yu-Te Hsu
  • Bai Yang Wang
  • Maarten Berben
  • Kyuho Lee
  • Caitlin Duffy
  • Thom Ottenbros
  • Woo Jin Kim
  • Motoki Osada
  • Steffen Wiedmann
  • Harold Y. Hwang
  • Nigel E. Hussey

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article numberL042015
Journal / PublicationPhysical Review Research
Volume3
Issue number4
Online published2 Nov 2021
Publication statusPublished - Nov 2021

Abstract

We report a systematic magnetotransport study of superconducting infinite-layer nickelate thin films Nd1-xSrxNiO2 with 0.15 ≤ x ≤ 0.225. By suppressing superconductivity with out-of-plane magnetic fields up to 37.5 T, we find that the normal state resistivity of Nd1-xSrxNiO2 is characterized by a crossover from a metallic T2 behavior to an insulating log(1/T) behavior for all x except x = 0.225, at which the resistivity is predominantly metallic. The log(1/T) behavior is found to be robust against magnetic fields, inconsistent with scenarios involving localization or Kondo scattering, and points to an anomalous insulating state possibly driven by strong correlations. In the metallic state, we find no evidence for non-Fermi-liquid behavior arising from proximity to a putative quantum critical point located inside the superconducting dome.

Research Area(s)

  • QUANTUM CRITICAL-POINT, NORMAL-STATE, LA2-XSRXCUO4, TRANSPORT, INPLANE

Citation Format(s)

Insulator-to-metal crossover near the edge of the superconducting dome in Nd1-xSrxNiO2. / Hsu, Yu-Te; Wang, Bai Yang; Berben, Maarten; Li, Danfeng; Lee, Kyuho; Duffy, Caitlin; Ottenbros, Thom; Kim, Woo Jin; Osada, Motoki; Wiedmann, Steffen; Hwang, Harold Y.; Hussey, Nigel E.

In: Physical Review Research, Vol. 3, No. 4, L042015, 11.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review