KFU. Card publication. Josephson current mediated by ballistic topological states in Bi2Te2.3Se0.7 single nanocrystals

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JOSEPHSON CURRENT MEDIATED BY BALLISTIC TOPOLOGICAL STATES IN BI2TE2.3SE0.7 SINGLE NANOCRYSTALS

Form of presentation

Articles in international journals and collections

Year of publication

2020

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Authors, employees of KFU

Gumarov Amir Ildusovich, author

Stolyarov Vasiliy Sergeevich, author

Bibliographic description in the original language

Josephson current mediated by ballistic topological states in Bi2Te2.3Se0.7 single nanocrystals / Vasily S. Stolyarov, Dmitry S. Yakovlev, Sergei N. Kozlov, Olga V. Skryabina, Dmitry S. Lvov, Amir I. Gumarov, Olga V. Emelyanova, Pavel S. Dzhumaev, Igor V. Shchetinin, Razmik A. Hovhannisyan, Sergey V. Egorov, Andrey M. Kokotin, Walter V. Pogosov, Valery V. Ryazanov, Mikhail Yu. Kupriyanov, Alexander. A. Golubov & Dimitri Roditchev // Communications Materials. - 2020. - V.1, N38. - P.1-11. (Springer Nature Group journal)

Annotation

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.

Keywords

Superconducting proximity devices, proxymity effect, josephson current

The name of the journal

Communications Materials

URL

https://www.nature.com/articles/s43246-020-0037-y#citeas

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=235969&p_lang=2

Resource files

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F_CommMat_1_38__2020_1_11.pdf	2,26	pdf	show / download

Full metadata record

Field DC	Value	Language
dc.contributor.author	Gumarov Amir Ildusovich	ru_RU
dc.contributor.author	Stolyarov Vasiliy Sergeevich	ru_RU
dc.date.accessioned	2020-01-01T00:00:00Z	ru_RU
dc.date.available	2020-01-01T00:00:00Z	ru_RU
dc.date.issued	2020	ru_RU
dc.identifier.citation	Josephson current mediated by ballistic topological states in Bi2Te2.3Se0.7 single nanocrystals / Vasily S. Stolyarov, Dmitry S. Yakovlev, Sergei N. Kozlov, Olga V. Skryabina, Dmitry S. Lvov, Amir I. Gumarov, Olga V. Emelyanova, Pavel S. Dzhumaev, Igor V. Shchetinin, Razmik A. Hovhannisyan, Sergey V. Egorov, Andrey M. Kokotin, Walter V. Pogosov, Valery V. Ryazanov, Mikhail Yu. Kupriyanov, Alexander. A. Golubov & Dimitri Roditchev // Communications Materials. - 2020. - V.1, N38. - P.1-11. (Springer Nature Group journal)	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=235969&p_lang=2	ru_RU
dc.description.abstract	Communications Materials	ru_RU
dc.description.abstract	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.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Superconducting proximity devices	ru_RU
dc.subject	proxymity effect	ru_RU
dc.subject	josephson current	ru_RU
dc.title	Josephson current mediated by ballistic topological states in Bi2Te2.3Se0.7 single nanocrystals	ru_RU
dc.type	Articles in international journals and collections	ru_RU