Quasi-localized Impurity State in Doped Topological Crystalline Insulator Sn0.9In0.1Te Probed by 125Te-NMR

  title={Quasi-localized Impurity State in Doped Topological Crystalline Insulator Sn0.9In0.1Te Probed by 125Te-NMR},
  author={Satoki Maeda and Shotaro Katsube and Guo-qing Zheng},
  journal={Journal of the Physical Society of Japan},
The In-doped topological crystalline insulator Sn1−xInxTe is a promising candidate for a topological superconductor, where it is theoretically suggested that In creates an impurity state responsible for superconductivity. We synthesized high purity Sn1−xInxTe samples and performed 125Te-nuclear magnetic resonance (NMR) measurements. The NMR spectra under a magnetic field of H0 = 5 T show a broadening characteristic due to a localized impurity state. The spin–lattice relaxation rate (1/T1… 
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