scholarly journals Conductance spectroscopy of topological superconductor wire junctions

2015 ◽  
Vol 91 (21) ◽  
Author(s):  
F. Setiawan ◽  
P. M. R. Brydon ◽  
Jay D. Sau ◽  
S. Das Sarma
Keyword(s):  
Topological Superconductor ◽  
Superconductor Wire

scholarly journals Topological isoconductance signatures in Majorana nanowires

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
L. S. Ricco ◽  
J. E. Sanches ◽  
Y. Marques ◽  
M. de Souza ◽  
M. S. Figueira ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Transport Properties ◽  
Spin Polarization ◽  
Bound States ◽  
Spin Asymmetry ◽  
Experimental Protocol ◽  
Zero Bias ◽  
Topological Superconductor ◽  
Hybrid Device ◽  
Majorana Bound States

AbstractWe consider transport properties of a hybrid device composed by a quantum dot placed between normal and superconducting reservoirs, and coupled to a Majorana nanowire: a topological superconducting segment hosting Majorana bound states (MBSs) at the opposite ends. It is demonstrated that if highly nonlocal and nonoverlapping MBSs are formed in the system, the zero-bias Andreev conductance through the dot exhibits characteristic isoconductance profiles with the shape depending on the spin asymmetry of the coupling between the dot and the topological superconductor. Otherwise, for overlapping MBSs with less degree of nonlocality, the conductance is insensitive to the spin polarization and the isoconductance signatures disappear. This allows to propose an alternative experimental protocol for probing the nonlocality of the MBSs in Majorana nanowires.

Optimization of Nb3SnCu superconductor wire prepared by the in situ process

1981 ◽  
Vol 29 (11) ◽  
pp. 1791-1796 ◽  
Author(s):  
J.J. Sue ◽  
J.D. Verhoeven ◽  
E.D. Gibson ◽  
J.E. Ostenson ◽  
D.K. Finnemore
Keyword(s):  
Superconductor Wire

scholarly journals Probing the superconducting gap structure in the noncentrosymmetric topological superconductor ZrRuAs

2021 ◽  
Vol 103 (14) ◽  
Author(s):  
Debarchan Das ◽  
D. T. Adroja ◽  
M. R. Lees ◽  
R. W. Taylor ◽  
Z. S. Bishnoi ◽  
...  
Keyword(s):  
Superconducting Gap ◽  
Topological Superconductor ◽  
Gap Structure

scholarly journals Josephson effect in junctions of conventional and topological superconductors

2018 ◽  
Vol 9 ◽  
pp. 1659-1676 ◽  
Author(s):  
Alex Zazunov ◽  
Albert Iks ◽  
Miguel Alvarado ◽  
Alfredo Levy Yeyati ◽  
Reinhold Egger
Keyword(s):  
Bound States ◽  
Josephson Effect ◽  
Mean Field ◽  
Josephson Current ◽  
Field Analysis ◽  
Current Phase ◽  
Topological Superconductor ◽  
Topological Superconductors ◽  
Spin Singlet ◽  
Hybrid Devices

We present a theoretical analysis of the equilibrium Josephson current-phase relation in hybrid devices made of conventional s-wave spin-singlet superconductors (S) and topological superconductor (TS) wires featuring Majorana end states. Using Green’s function techniques, the topological superconductor is alternatively described by the low-energy continuum limit of a Kitaev chain or by a more microscopic spinful nanowire model. We show that for the simplest S–TS tunnel junction, only the s-wave pairing correlations in a spinful TS nanowire model can generate a Josephson effect. The critical current is much smaller in the topological regime and exhibits a kink-like dependence on the Zeeman field along the wire. When a correlated quantum dot (QD) in the magnetic regime is present in the junction region, however, the Josephson current becomes finite also in the deep topological phase as shown for the cotunneling regime and by a mean-field analysis. Remarkably, we find that the S–QD–TS setup can support φ0-junction behavior, where a finite supercurrent flows at vanishing phase difference. Finally, we also address a multi-terminal S–TS–S geometry, where the TS wire acts as tunable parity switch on the Andreev bound states in a superconducting atomic contact.

scholarly journals Evidence for singular-phonon-induced nematic superconductivity in a topological superconductor candidate Sr0.1Bi2Se3

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Jinghui Wang ◽  
Kejing Ran ◽  
Shichao Li ◽  
Zhen Ma ◽  
Song Bao ◽  
...  
Keyword(s):  
Topological Superconductor
Sign in / Sign up

Export Citation Format

Share Document