Topological phase diagram of a three-terminal Josephson junction: From the conventional to the Majorana regime

PERALTA GAVENSKY, LUCILA; USAJ, GONZALO; BALSEIRO, C. A.

Physical Review B

AMERICAN PHYS SOC

Año: 2019 vol. 100 p. 14514 - 14514

2469-9950

We study the evolution of averaged transconductances in three-terminal Josephson junctions when the super-conducting leads are led throughout a topological phase transition from an s-wave to a p-wave (Majorana) phaseby an in-plane magnetic field B x . We provide a complete description of this transition as a function of B x and amagnetic flux threading the junction. For that we use a spinful model within a formalism that allows us to treaton an equal footing the contribution to the transconductance from both the Andreev subgap levels and the con-tinuum spectrum. We unveil a fractionalization in the quantization of the transconductance due to the presenceof Majorana quasiparticles, reflecting the effective pumping of half a Cooper pair charge in the p-wave regime.