Fig. 1
From: Joule overheating poisons the fractional ac Josephson effect in topological Josephson junctions
Topological Josephson junction on Bi2Se3. a Energy-phase spectrum of the Andreev bound states for a topological Josephson junction at the surface of a 3D-topological insulator. 4π-periodic, spinless, Majorana bound states coexist with conventional 2π-periodic Andreev bound states (ABS). The maximum energy EABS is lower than the quasiparticle continuum at Δ in case of imperfect interface transparency or the presence of a magnetic barrier3,15,43. b Optical image of device. Scale bar is 9 μm. c Schematic of the Josephson junction geometry showing the superconducting electrodes (S) in orange that contact the top of the Bi2Se3 flake (in blue). d Current-voltage characteristic of the junction indicated by the arrow in c. Measurements were carried out at 0.05 K
