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Research Highlight | Materials Science Division

Topological superconductivity in Sr0.1Bi2Se3

In a study published in Scientific Reports, researchers reported results support the recently proposed odd-parity nematic state characterized by a nodal gap of Eu symmetry in SrxBi2Se3.

Scientific Achievement

We revealed a pronounced two-fold, in-plane superconducting anisotropy in trigonal Sr0.1Bi2Se3 in the absence of any discernable normal-state anisotropy or crystal lattice distortions.

Significance and Impact

Our results support the conclusion that the two-fold anisotropy is caused by the nematic nodal D4x gap and identify Sr0.1Bi2Se3 as a bulk topological superconductor.

Research Details

  • Angular dependent magneto-transport and magnetization measurements reveal a robust two-fold symmetric superconducting and isotropic normal state.
  • High-resolution synchrotron X-ray diffraction confirms an essentially ideal trigonal  crystal structure. 

DOI10.1038/s41598-018-26032-0

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