Josephson current mediated by ballistic topological states in Bi2Te2.3Se0.7 single nanocrystals
Superconducting proximity devices using low-dimensional semiconducting elements enable a ballistic regime in the proximity transport. The use of topological insulators in such devices is considered promising owing to the peculiar transport properties these materials offer, as well the hope of inducing topological superconductivity and Majorana phenomena via proximity effects. Here we demonstrate the fabrication and superconducting properties of proximity Josephson devices integrating nanocrystals single of Bi2Te2.3Se0.7 with a thickness of a few unit cells. Single junctions display typical characteristics of planar Josephson devices; junctions integrating two nanocrystals behave as nanodimensional superconducting quantum interference devices. A peculiar temperature and magnetic field evolution of the Josephson current along with the observed excess current effect point towards the ballistic proximity regime of topological channels. This suggests the proposed devices are promising for testing topological superconducting phenomena in two-dimensions.
Citations by journals
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Journal of Physical Chemistry Letters
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American Chemical Society (ACS)
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Wiley
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Multidisciplinary Digital Publishing Institute (MDPI)
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Multidisciplinary Digital Publishing Institute (MDPI)
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- Center for Advanced Methods of Mesophysics and Nanotechnology
- Laboratory of Nanostructure Physics at the Moscow State University
- Laboratory of Physics of Micro- and Nanostructures
- Laboratory of Superconducting and Quantum Technologies
- Laboratory of Topological Quantum Phenomena in Superconducting Systems
- Multifunctional magnetic nanomaterials
- Dzhumaev, Pavel Sergeevich
- Golubov, Alexander Avraamovitch
- Gumarov, Amir Ildusovich
- Hovhannisyan, Razmik A
- Kozlov, Sergei N
- Kupriyanov, Mikhail Yuryevich
- Lvov, Dmitry S
- Pogosov, Walter V
- Roditchev, Dimitri Yu
- Ryazanov, Valeriy V
- Shchetinin, Igor V.
- Skryabina, Olga Viktorovna
- Stolyarov, Vasily Sergeevich
- Yakovlev, Dmitry Sergeevich