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- W2899027486 abstract "We consider a Josephson junction bilayer consisting of two tunnel-coupled two-dimensional electron gas layers with Rashba spin-orbit interaction, proximitized by a top and bottom $s$-wave superconductor with phase difference $phi$ close to $pi$. We show that, in the presence of a finite weak in-plane Zeeman field, the bilayer can be driven into a second order topological superconducting phase, hosting two Majorana corner states (MCSs). If $phi=pi$, in a rectangular geometry, these zero-energy bound states are located at two opposite corners determined by the direction of the Zeeman field. If the phase difference $phi$ deviates from $pi$ by a critical value, one of the two MCSs gets relocated to an adjacent corner. As the phase difference $phi$ increases further, the system becomes trivially gapped. The obtained MCSs are robust against static and magnetic disorder. We propose two setups that could realize such a model: one is based on controlling $phi$ by magnetic flux, the other involves an additional layer of randomly-oriented magnetic impurities responsible for the phase shift of $pi$ in the proximity-induced superconducting pairing." @default.
- W2899027486 created "2018-11-09" @default.
- W2899027486 creator A5010879789 @default.
- W2899027486 creator A5026542042 @default.
- W2899027486 creator A5041982379 @default.
- W2899027486 date "2019-03-28" @default.
- W2899027486 modified "2023-09-29" @default.
- W2899027486 title "Second-Order Topological Superconductivity in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>π</mml:mi></mml:math> -Junction Rashba Layers" @default.
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- W2899027486 doi "https://doi.org/10.1103/physrevlett.122.126402" @default.