Tunability of the Andreev reflection induced by the Majorana zero mode
| Autor: | Tian-Fang Zheng, Xiao-Qi Wang, Qi Wang, Weijiang Gong, Xian-Di Wang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Physics Zeeman effect Zero mode Condensed matter physics 02 engineering and technology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology Condensed Matter Physics Antiresonance 01 natural sciences Electronic Optical and Magnetic Materials Andreev reflection symbols.namesake MAJORANA Quantum dot 0103 physical sciences symbols Coulomb Direct coupling Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Physica B: Condensed Matter. 574:311658 |
| ISSN: | 0921-4526 |
| Popis: | The Andreev reflection induced by Majorana zero mode (MZM) is theoretically investigated, by considering the existence of two coupling manners between the MZM and normal metallic lead, i.e., the direct coupling and the indirect coupling via a quantum dot. We find that in the noninteracting or weak-Coulomb cases, the low-bias conductance can be modulated by the interplay among the structural parameters. As a result, the conductance peak at the zero-bias limit has an opportunity to change into antiresonance in the case of appropriate structural parameters. When strong intradot Coulomb interaction is taken into account, the zero-bias conductance tends to show up as one peak with its width tightly related to the level, Coulomb strength, and the Zeeman splitting of the quantum dot. We believe that this work is helpful for ascertaining the signature of MZM in the Andreev reflection spectrum. |
| Databáze: | OpenAIRE |
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