scholarly journals Symmetry indicators for topological superconductors

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Seishiro Ono ◽  
Youichi Yanase ◽  
Haruki Watanabe
Keyword(s):  
Topological Superconductors

scholarly journals Optical manipulation of domains in chiral topological superconductors

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Tao Yu ◽  
Martin Claassen ◽  
Dante M. Kennes ◽  
Michael A. Sentef
Keyword(s):  
Optical Manipulation ◽  
Topological Superconductors

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 Assessing Bound States in a One-Dimensional Topological Superconductor: Majorana versus Tamm

2021 ◽  
Author(s):  
Niccolò Traverso Ziani ◽  
Lucia Vigliotti ◽  
Matteo Carrega ◽  
Fabio Cavaliere
Keyword(s):  
Quantum Computation ◽  
Bound States ◽  
Research Activity ◽  
One Dimensional ◽  
Majorana Bound States ◽  
Topological Superconductors ◽  
Topological Quantum ◽  
Tamm State ◽  
Topological Quantum Computation ◽  
Intense Research

Majorana bound states in topological superconductors have attracted intense research activity in view of applications in topological quantum computation. However, they are not the only example of topological bound states that can occur in such systems. We here study a model in which both Majorana and Tamm bound states compete. We show both numerically and analytically that, surprisingly, the Tamm state remains partially localized even when the spectrum becomes gapless. Despite this fact, we demonstrate that the Majorana polarization shows a clear transition between the two regimes.

scholarly journals Bimodal conductance distribution of Kitaev edge modes in topological superconductors

2014 ◽  
Vol 16 (6) ◽  
pp. 063049 ◽  
Author(s):  
M Diez ◽  
I C Fulga ◽  
D I Pikulin ◽  
J Tworzydło ◽  
C W J Beenakker
Keyword(s):  
Topological Superconductors ◽  
Conductance Distribution

scholarly journals Correlated spin currents generated by resonant-crossed Andreev reflections in topological superconductors

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
James J. He ◽  
Jiansheng Wu ◽  
Ting-Pong Choy ◽  
Xiong-Jun Liu ◽  
Y. Tanaka ◽  
...  
Keyword(s):  
Spin Currents ◽  
Topological Superconductors
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