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Normal-state properties of the antiperovskite oxide Sr3xSnO revealed by Sn119-NMR

Shunsaku Kitagawa, Kenji Ishida, Mohamed Oudah, Jan Niklas Hausmann, Atsutoshi Ikeda, Shingo Yonezawa, and Yoshiteru Maeno
Phys. Rev. B 98, 100503(R) – Published 21 September 2018
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Abstract

We have performed Sn119-NMR measurements on the antiperovskite oxide superconductor Sr3xSnO to investigate how its normal state changes with the Sr deficiency. A two-peak structure was observed in the NMR spectra of all the measured samples. This suggests that the phase separation tends to occur between the nearly stoichiometric and heavily Sr-deficient Sr3xSnO phases. The measurement of the nuclear spin-lattice relaxation rate 1/T1 indicates that the Sr-deficient phase shows a conventional metallic behavior due to the heavy hole doping. In contrast, the nearly stoichiometric phase exhibits unusual temperature dependence of 1/T1, attributable to the presence of a Dirac-electron band.

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  • Received 5 July 2018
  • Revised 17 August 2018

DOI:https://doi.org/10.1103/PhysRevB.98.100503

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Shunsaku Kitagawa1,*, Kenji Ishida1, Mohamed Oudah1, Jan Niklas Hausmann1,2, Atsutoshi Ikeda1, Shingo Yonezawa1, and Yoshiteru Maeno1

  • 1Department of Physics, Kyoto University, Kyoto 606-8502, Japan
  • 2Department of Chemistry, Humboldt-Universität zu Berlin, Berlin 12489, Germany

  • *kitagawa.shunsaku.8u@kyoto-u.ac.jp

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Issue

Vol. 98, Iss. 10 — 1 September 2018

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