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arXiv · 1206.3912

Majorana single-charge transistor

R. Hützen·A. Zazunov·B. Braunecker·A. Levy Yeyati·R. Egger
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Abstract

We study transport through a Coulomb blockaded topologically nontrivial superconducting wire (with Majorana end states) contacted by metallic leads. An exact formula for the current through this interacting Majorana single-charge transistor is derived in terms of wire spectral functions. A comprehensive picture follows from three different approaches. We find Coulomb oscillations with universal halving of the finite-temperature peak conductance under strong blockade conditions, where the valley conductance mainly comes from elastic cotunneling. The nonlinear conductance exhibits finite-voltage sidebands due to anomalous tunneling involving Cooper pair splitting.

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R. Hützen, A. Zazunov, B. Braunecker, A. Levy Yeyati, R. Egger. 2012-10-23. Majorana single-charge transistor. https://doi.org/10.1103/physrevlett.109.166403

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