%0 Journal Article %1 PhysRevB.100.165420 %A Schulz, F. %A Budich, J. C. %A Novik, E. G. %A Recher, P. %A Trauzettel, B. %D 2019 %I American Physical Society %J Phys. Rev. B %K a %N 16 %P 165420 %R 10.1103/PhysRevB.100.165420 %T Voltage-tunable Majorana bound states in time-reversal symmetric bilayer quantum spin Hall hybrid systems %U https://link.aps.org/doi/10.1103/PhysRevB.100.165420 %V 100 %X We investigate hybrid structures based on a bilayer quantum spin Hall system in proximity to an s-wave superconductor as a platform to mimic time-reversal symmetric topological superconductors. In this bilayer setup, the induced pairing can be of intra- or inter-layer type, and domain walls of those different types of pairing potentials host Kramers partners (time-reversal conjugate pairs) of Majorana bound states. Interestingly, we discover that such topological interfaces providing Majorana bound states can also be achieved in an otherwise homogeneous system by a spatially dependent inter-layer gate voltage. This gate voltage causes the relative electron densities of the two layers to vary accordingly which suppresses the inter-layer pairing in regions with strong gate voltage. We identify particular transport signatures (zero-bias anomalies) in a five-terminal setup that are uniquely related to the presence of Kramers pairs of Majorana bound states.

@article{PhysRevB.100.165420, abstract = {We investigate hybrid structures based on a bilayer quantum spin Hall system in proximity to an s-wave superconductor as a platform to mimic time-reversal symmetric topological superconductors. In this bilayer setup, the induced pairing can be of intra- or inter-layer type, and domain walls of those different types of pairing potentials host Kramers partners (time-reversal conjugate pairs) of Majorana bound states. Interestingly, we discover that such topological interfaces providing Majorana bound states can also be achieved in an otherwise homogeneous system by a spatially dependent inter-layer gate voltage. This gate voltage causes the relative electron densities of the two layers to vary accordingly which suppresses the inter-layer pairing in regions with strong gate voltage. We identify particular transport signatures (zero-bias anomalies) in a five-terminal setup that are uniquely related to the presence of Kramers pairs of Majorana bound states.}, added-at = {2020-03-20T11:32:30.000+0100}, author = {Schulz, F. and Budich, J. C. and Novik, E. G. and Recher, P. and Trauzettel, B.}, biburl = {https://www.bibsonomy.org/bibtex/20ba675630f38a7ad5b56ef3269d47fbe/ctqmat}, day = 25, description = {Phys. Rev. B 100, 165420 (2019) - Voltage-tunable Majorana bound states in time-reversal symmetric bilayer quantum spin Hall hybrid systems}, doi = {10.1103/PhysRevB.100.165420}, interhash = {62808e48e64ffe504f027fea6b7767b9}, intrahash = {0ba675630f38a7ad5b56ef3269d47fbe}, journal = {Phys. Rev. B}, keywords = {a}, month = {10}, note = {cite arxiv:1904.07166}, number = 16, numpages = {12}, pages = 165420, publisher = {American Physical Society}, timestamp = {2023-01-16T14:49:29.000+0100}, title = {Voltage-tunable Majorana bound states in time-reversal symmetric bilayer quantum spin Hall hybrid systems}, url = {https://link.aps.org/doi/10.1103/PhysRevB.100.165420}, volume = 100, year = 2019 }