info:eu-repo/semantics/article
Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors
Fecha
2017-07Registro en:
Camjayi, Alberto; Arrachea, Liliana del Carmen; Aligia, Armando Ángel; Von Oppen, Felix; Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors; American Physical Society; Physical Review Letters; 119; 4; 7-2017; 1-5; 046801
0031-9007
1079-7114
CONICET Digital
CONICET
Autor
Camjayi, Alberto
Arrachea, Liliana del Carmen
Aligia, Armando Ángel
Von Oppen, Felix
Resumen
Time-reversal-invariant topological superconducting (TRITOPS) wires are known to host a fractional spin /4 at their ends. We investigate how this fractional spin affects the Josephson current in a TRITOPS-quantum dot-TRITOPS Josephson junction, describing the wire in a model that can be tuned between a topological and a nontopological phase. We compute the equilibrium Josephson current of the full model by continuous-time Monte Carlo simulations and interpret the results within an effective low-energy theory. We show that in the topological phase, the 0-to-π transition is quenched via formation of a spin singlet from the quantum-dot spin and the fractional spins associated with the two adjacent topological superconductors.