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Andreev reflection at the edge of a two-dimensional electron system with strong spin-orbit coupling |
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| Authors: | A. Kononov G. Biasiol L. Sorba E. V. Deviatov |
| Affiliation: | 1. Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432, Russia 2. Moscow Institute of Physics and Technology (State University), Dolgoprudnyi, Moscow region, 141700, Russia 3. IOM CNR, Laboratorio TASC, Trieste, 34149, Italy 4. NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Pisa, 56127, Italy |
| Abstract: | We experimentally investigate transport properties of a single planar junction between the niobium superconductor and the edge of a two-dimensional electron system in a narrow In0.75Ga0.25As quantum well with strong Rashba-type spin-orbit coupling. We experimentally demonstrate suppression of Andreev reflection at low biases at ultralow temperatures. From the analysis of temperature and magnetic field behavior, we interpret the observed suppression as a result of a spin-orbit coupling. There is also an experimental sign of the topological superconductivity realization in the present structure. |
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