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

@article{Maeda2016QuasilocalizedIS,
  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},
  year={2016},
  volume={86},
  pages={024702}
}
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… 
3 Citations

Figures from this paper

Observation of Coexisting Weak Localization and Superconducting Fluctuations in Strained Sn1-xInxTe Thin Films.
Topological superconductors have attracted tremendous excitement as they are predicted to host Majorana zero modes that can be utilized for topological quantum computing. Candidate topological
Indium Substitution Effect on the Topological Crystalline Insulator Family (Pb1−xSnx)1−yInyTe: Topological and Superconducting Properties
Topological crystalline insulators (TCIs) have been of great interest in the area of condensed matter physics. We investigated the effect of indium substitution on the crystal structure and transport
Synthesis and superconductivity of In-doped SnTe nanostructures
InxSn1−xTe is a time-reversal invariant candidate 3D topological superconductor derived from doping the topological crystalline insulator SnTe with indium. The ability to synthesize low-dimensional

References

SHOWING 1-10 OF 26 REFERENCES
Topological crystalline insulators in the SnTe material class.
TLDR
This work predicts the first material realization of topological crystalline insulator in the semiconductor SnTe by identifying its non-zero topological index and predicts that as a manifestation of this non-trivial topology, SnTe has metallic surface states with an even number of Dirac cones on high-symmetry crystal surfaces.
Topological insulators and superconductors
Topological insulators are new states of quantum matter which cannot be adiabatically connected to conventional insulators and semiconductors. They are characterized by a full insulating gap in the
Surface electronic state of superconducting topological crystalline insulator
We study the surface state of a doped topological crystalline insulator in the superconducting state. Motivated by Sn$_{1-x}$In$_x$Te, we consider fully gapped pair potentials and calculate the
Mixed-valence behaviour of impurities as a mechanism for superconductivity in IV–VI compounds
Abstract The properties of PbTe and SnTe doped with elements (indium and thallium), which create localized levels in an allowed band, are discussed from a point of view based on ideas from the theory
Superconductivity in CuxBi2Se3 and its implications for pairing in the undoped topological insulator.
TLDR
It is shown that copper intercalation in the van der Waals gaps between the Bi2Se3 layers, yielding an electron concentration of approximately 2x10{20} cm{-3}, results in superconductivity at 3.8 K in CuxBi2 Se3 for 0.12<or=x<or =0.15.
Anomalous scattering in superconducting indium-doped tin telluride
Results of resistivity, Hall effect, magnetoresistance, susceptibility and heat capacity measurements are presented for single crystals of indium-doped tin telluride with compositions
Odd-parity pairing and topological superconductivity in a strongly spin-orbit coupled semiconductor.
The existence of topological superconductors preserving time-reversal symmetry was recently predicted, and they are expected to provide a solid-state realization of itinerant massless Majorana
Nuclear magnetic resonance as a probe of electronic states of Bi 2 Se 3
We present magnetotransport and Bi-209 nuclear magnetic resonance (NMR) data on a series of single crystals of Bi2Se3, Bi2Te2Se and Cu_xBi2Se3 with varying carrier concentrations. The Knight shift of
Transverse Nernst-Ettingshausen effect, resonant scattering, and superconductivity in SnTe: In
AbstractThe temperature dependences of the coefficient of the transverse Nernst-Ettingshausen effect in SnTe: In samples with different indium contents (1–16 at %) in the temperature range 100–300 K
Enhanced superconducting pairing interaction in indium-doped tin telluride
The ferroelectric degenerate semiconductor Sn{sub 1-{delta}}Te exhibits superconductivity with critical temperatures, T{sub c}, of up to 0.3 K for hole densities of order 10{sup 21} cm{sup -3}. When
...
1
2
3
...