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TT: Fachverband Tiefe Temperaturen

TT 65: Poster Session Topological Topics

TT 65.24: Poster

Donnerstag, 19. März 2020, 15:00–19:00, P2/EG

Conductance through a quantum-Hall-superconductor junction from a tunneling perspective — •Fernando Dominguez Tijero¹ and Ewelina Maria Hanckiewicz² — ¹Institute for Mathematical Physics, TU Braunschweig, D-38106 Braunschweig, Germany — ²Institute for Theoretical Physics and Astrophysics and Würzburg-Dresden Cluster of Excellence ct.qmat,University of Würzburg, Am Hubland, 97074 Würzburg, Germany

Motivated by the increasing number of transport experiments between a quantum-Hall (QH) bar and a superconducting (S) contact [1-5], we have investigated the current and noise between these two different subsystems using a tunneling approximation. This perturbative approach allows to understand the transport mechanism in a clearer way than previous numerical results based on an extended BTK formalism [6]. In addition, it allows to derive analytical results for the conductance and makes it possible to extend the study to other scenarios, such as QH-S-QH or fractional QH-S.

[1] P. Rickhaus et al. Nanoletters 12 1942 (2012)

[2] F. Amet et al. Science 352 966 (2016)

3] G.-H. Lee, et al.Nat. Phys. 13 693 (2017)

[4] M. R. Sahu et al. Phys. Rev. Lett. 121 086809 (2018)

[5] A. Seredinski et al. Science Adv. (2019)

[6] Hope et al. Phys Rev. Lett. 84 1804 (2000)