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Spin-singlet superconductivity in the doped topological crystalline insulator Sn0.96In0.04Te (CROSBI ID 249968)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Maeda, Satoki ; Hirose, Ryohei ; Matano, Kazuaki ; Novak, Mario ; Ando, Yoichi ; Zheng, Guo-qing Spin-singlet superconductivity in the doped topological crystalline insulator Sn0.96In0.04Te // Physical review. B, 96 (2017), 10; 104502, 5. doi: 10.1103/physrevb.96.104502

Podaci o odgovornosti

Maeda, Satoki ; Hirose, Ryohei ; Matano, Kazuaki ; Novak, Mario ; Ando, Yoichi ; Zheng, Guo-qing

engleski

Spin-singlet superconductivity in the doped topological crystalline insulator Sn0.96In0.04Te

The In-doped topological crystalline insulator Sn1−xInxTe is a candidate for a topological superconductor, where a pseudo-spin-triplet state has been proposed. To clarify the spin symmetry of Sn1−xInxTe, we perform 125Te-nuclear magnetic resonance (NMR) measurements in polycrystalline samples with 0 x 0.15. The penetration depth calculated from the NMR line width is T independent below half the superconducting transition temperature (Tc) in polycrystalline Sn0.96In0.04Te, which indicates a fully opened superconducting gap. In this sample, the spin susceptibility measured by the spin Knight shift (Ks) at an external magnetic field of μ0H0 = 0.0872 T decreases below Tc, and Ks(T = 0)/Ks(T = Tc) reaches 0.36 ± 0.10, which is far below the limiting value 2/3 expected for a spin-triplet state for a cubic crystal structure. Our result indicates that polycrystalline Sn0.96In0.04Te is a spin-singlet superconductor.

superconductivity ; crystalline insulator

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Podaci o izdanju

96 (10)

2017.

104502

5

objavljeno

2469-9950

2469-9969

10.1103/physrevb.96.104502

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