2018/09/21 by Shunsaku Kitagawa, Kenji Ishida, K. Ishida +7 · 12 citations
Chemistry · Materials Science · Physics and Astronomy · #Analytical Chemistry (journal) #Antiperovskite #Chemistry #Condensed matter physics #Ferroelectric and Piezoelectric Materials #Magnetic and transport properties of perovskites and related materials #Materials science #Nanotechnology #Oxide #Phase (matter) #Physical chemistry #Physics #Quantum mechanics #Relaxation (psychology) #Spectral line #Stoichiometry #Thermal Expansion and Ionic Conductivity #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.98.100503
published in Physical review. B./Physical review. B 98(10) (American Physical Society) · 5 pages, 4 figures
openalex publication_date 2018/09/21 · arxiv created 2018/09/25 · arxiv updated 2018/09/26 · openalex created_date 2018/10/05 · openalex updated_date 2026/08/06
We have performed 119Sn-NMR measurements on the antiperovskite oxide superconductor Sr_3\ensuremath-xSnO 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 Sr_3\ensuremath-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.