Quantum Oscillations in a Candidate Topological Superconductor, a Copper-doped Topological Insulator: Cu1/4Bi2Se3

A superconducting ground state has been observed at T < 3.8 K in copper-doped Bi₂Se₃ single crystals. Topological superconductivity is predicted in this material, assuming the superconducting electrons follow the linear energy-momentum dispersion (Dirac-like) seen in graphene and other materials of current interest. However, this presumption had not yet been confirmed by quantum oscillation measurements.