TY - JOUR
T1 - Detecting Majorana nonlocality using strongly coupled Majorana bound states
AU - Rubbert, S.
AU - Akhmerov, A. R.
PY - 2016/9/22
Y1 - 2016/9/22
N2 - Majorana bound states (MBS) differ from the regular zero energy Andreev bound states in their nonlocal properties, since two MBS form a single fermion. We design strategies for detection of this nonlocality by using the phenomenon of Coulomb-mediated Majorana coupling in a setting which still retains falsifiability and does not require locally separated MBS. Focusing on the implementation of MBS based on the quantum spin Hall effect, we also design a way to probe Majoranas without the need to open a magnetic gap in the helical edge states. In the setup that we analyze, long range MBS coupling manifests in the h/e magnetic flux periodicity of tunneling conductance and supercurrent. While h/e is also the periodicity of Aharonov-Bohm effect and persistent current, we show how to ensure its Majorana origin by verifying that switching off the charging energy restores h/2e periodicity conventional for superconducting systems.
AB - Majorana bound states (MBS) differ from the regular zero energy Andreev bound states in their nonlocal properties, since two MBS form a single fermion. We design strategies for detection of this nonlocality by using the phenomenon of Coulomb-mediated Majorana coupling in a setting which still retains falsifiability and does not require locally separated MBS. Focusing on the implementation of MBS based on the quantum spin Hall effect, we also design a way to probe Majoranas without the need to open a magnetic gap in the helical edge states. In the setup that we analyze, long range MBS coupling manifests in the h/e magnetic flux periodicity of tunneling conductance and supercurrent. While h/e is also the periodicity of Aharonov-Bohm effect and persistent current, we show how to ensure its Majorana origin by verifying that switching off the charging energy restores h/2e periodicity conventional for superconducting systems.
UR - http://www.scopus.com/inward/record.url?scp=84990996548&partnerID=8YFLogxK
UR - http://resolver.tudelft.nl/uuid:fd47dcf2-458b-4972-8c26-626adaa38eec
U2 - 10.1103/PhysRevB.94.115430
DO - 10.1103/PhysRevB.94.115430
M3 - Article
AN - SCOPUS:84990996548
SN - 1098-0121
VL - 94
SP - 1
EP - 5
JO - Physical Review B (Condensed Matter and Materials Physics)
JF - Physical Review B (Condensed Matter and Materials Physics)
IS - 11
M1 - 115430
ER -