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Title: Normal-state properties of the antiperovskite oxide Sr₃₋xSnO revealed by ¹¹⁹Sn-NMR
Authors: Kitagawa, Shunsaku
Ishida, Kenji
Oudah, Mohamed
Hausmann, Jan Niklas
Ikeda, Atsutoshi
Yonezawa, Shingo
Maeno, Yoshiteru
Author's alias: 北川, 俊作
石田, 憲二
池田, 敦俊
米澤, 進吾
前野, 悦輝
Issue Date: 21-Sep-2018
Publisher: American Physical Society (APS)
Journal title: Physical Review B
Volume: 98
Issue: 10
Thesis number: 100503(R)
Abstract: We have performed ¹¹⁹Sn-NMR measurements on the antiperovskite oxide superconductor Sr₃₋xSnOto 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 Sr₃₋xSnO 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.
Rights: ©2018 American Physical Society
DOI(Published Version): 10.1103/PhysRevB.98.100503
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