Quasi-localized impurity state in doped topological crystalline insulator Sn0.9In0.1Te probed by 125Te-NMR

Satoki Maeda, Shota Katsube, Guo-Qing Zheng

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The In-doped topological crystalline insulator Sn1-xInx Te 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-xInx Te 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) divided by temperature shows a Curie-Weiss like temperature-dependence under H0 = 0.1 T but is temperature-independent under H0 = 5 T. These results indicate the existence of quasi-localized impurity states due to In doping.

Original languageEnglish
Article number024702
JournalJournal of the Physical Society of Japan
Volume86
Issue number2
DOIs
Publication statusPublished - 2017

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insulators
impurities
nuclear magnetic resonance
spin-lattice relaxation
purity
superconductivity
temperature dependence
temperature
magnetic fields

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Quasi-localized impurity state in doped topological crystalline insulator Sn0.9In0.1Te probed by 125Te-NMR. / Maeda, Satoki; Katsube, Shota; Zheng, Guo-Qing.

In: Journal of the Physical Society of Japan, Vol. 86, No. 2, 024702, 2017.

Research output: Contribution to journalArticle

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AB - The In-doped topological crystalline insulator Sn1-xInx Te 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-xInx Te 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) divided by temperature shows a Curie-Weiss like temperature-dependence under H0 = 0.1 T but is temperature-independent under H0 = 5 T. These results indicate the existence of quasi-localized impurity states due to In doping.

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