Ballistic edge states in Bismuth nanowires revealed by SQUID interferometry
| Autor: | Murani, Anil, Kasumov, Alik, Sengupta, Shamashis, Kasumov, Yu. A., Volkov, V. T., Khodos, I. I., Brisset, F., Delagrange, Raphaëlle, Chepelianskii, Alexei, Deblock, Richard, Bouchiat, Hélène, Guéron, Sophie |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Nat Commun. 2017 Jul 5;8:15941 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/ncomms15941 |
| Popis: | Spin-orbit interactions are known to have drastic effects on the band structure of heavy-element-based materials. Celebrated examples are the recently identified 3D and 2D topological insulators. In those systems transport takes place at surfaces or along edges, and spin-momentum locking provides protection against (non-magnetic) impurity scattering, favoring spin-polarized ballistic transport. We have used the measurement of the current phase relation of a micrometer-long single crystal bismuth nanowire connected to superconducting electrodes, to demonstrate that transport occurs ballistically along two edges of this high-spin-orbit material. In addition, we show that a magnetic field can induce to 0-pi transitions and phi0-junction behavior, thanks to the extraordinarily high g-factor and spin orbit coupling in this system, providing a way to manipulate the phase of the supercurrent-carrying edge states. Comment: Includes main text and supplementary materials |
| Databáze: | arXiv |
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