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Signatures of nematic superconductivity in doped <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>Bi</mml:mi><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub><mml:mi>Se</mml:mi><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math> under applied stress
The ${M}_{x}{\text{Bi}}_{2}{\text{Se}}_{3}$ family are candidates for topological superconductors, where $M$ could be Cu, Sr, or Nb. Twofold anisotropy has been observed in various experiments, prompting the interpretation that the superconducting state is nematic. However, it has since been recognized in the literature that a twofold anisotropy in the upper critical …