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Title: Normal-state properties of the antiperovskite oxide Sr₃₋xSnO revealed by ¹¹⁹Sn-NMR
Authors: Kitagawa, Shunsaku  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-1855-4760 (unconfirmed)
Ishida, Kenji  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0003-2945-8755 (unconfirmed)
Oudah, Mohamed
Hausmann, Jan Niklas
Ikeda, Atsutoshi  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-9345-2967 (unconfirmed)
Yonezawa, Shingo  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-7476-3604 (unconfirmed)
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
URI: http://hdl.handle.net/2433/235675
DOI(Published Version): 10.1103/PhysRevB.98.100503
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