%0 Journal Article %1 PhysRevB.101.235308 %A Novik, E. G. %A Trauzettel, B. %A Recher, P. %D 2020 %I American Physical Society %J Phys. Rev. B %K a %N 23 %P 235308 %R 10.1103/PhysRevB.101.235308 %T Transport signatures of a junction between a quantum spin Hall system and a chiral topological superconductor %U https://link.aps.org/doi/10.1103/PhysRevB.101.235308 %V 101 %X We investigate transport through a normal-superconductor (NS) junction made from a quantum spin Hall (QSH) system with helical edge states and a two-dimensional (2D) chiral topological superconductor (TSC) having a chiral Majorana edge mode. We employ a two-dimensional extended four-band model for HgTe-based quantum wells in a magnetic (Zeeman) field and subject to s-wave superconductivity. We show using the Bogoliubov-de Gennes scattering formalism that this structure provides a striking transport signal of a 2D TSC. As a function of the sample width (or Fermi energy) the conductance resonances go through a sequence of 2e2/h (nontrivial phase) and 4e2/h plateaux (trivial phase) which fall within the region of a nonzero Chern number (2D limit) as the sample width becomes large. These signatures are a manifestation of the topological nature of the QSH effect and the TSC.

@article{PhysRevB.101.235308, abstract = {We investigate transport through a normal-superconductor (NS) junction made from a quantum spin Hall (QSH) system with helical edge states and a two-dimensional (2D) chiral topological superconductor (TSC) having a chiral Majorana edge mode. We employ a two-dimensional extended four-band model for HgTe-based quantum wells in a magnetic (Zeeman) field and subject to s-wave superconductivity. We show using the Bogoliubov-de Gennes scattering formalism that this structure provides a striking transport signal of a 2D TSC. As a function of the sample width (or Fermi energy) the conductance resonances go through a sequence of 2e2/h (nontrivial phase) and 4e2/h plateaux (trivial phase) which fall within the region of a nonzero Chern number (2D limit) as the sample width becomes large. These signatures are a manifestation of the topological nature of the QSH effect and the TSC.}, added-at = {2020-12-28T11:01:58.000+0100}, author = {Novik, E. G. and Trauzettel, B. and Recher, P.}, biburl = {https://www.bibsonomy.org/bibtex/298b2b22ee56ee210ff069d2445d97ba7/ctqmat}, day = 5, description = {Phys. Rev. B 101, 235308 (2020) - Transport signatures of a junction between a quantum spin Hall system and a chiral topological superconductor}, doi = {10.1103/PhysRevB.101.235308}, interhash = {e1f2f2fcd3c856e47171d7cc6a6c9e5c}, intrahash = {98b2b22ee56ee210ff069d2445d97ba7}, journal = {Phys. Rev. B}, keywords = {a}, month = {06}, number = 23, numpages = {11}, pages = 235308, publisher = {American Physical Society}, timestamp = {2023-01-16T14:49:29.000+0100}, title = {Transport signatures of a junction between a quantum spin Hall system and a chiral topological superconductor}, url = {https://link.aps.org/doi/10.1103/PhysRevB.101.235308}, volume = 101, year = 2020 }