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

Vasily S. Stolyarov; Dmitry Yakovlev; S. N. Kozlov; Olga V. Skryabina; Dmitry S. Lvov; Amir I. Gumarov; O.V. Emelyanova; P. S. Dzhumaev; I. V. Shchetinin; R. A. Hovhannisyan; S. V. Egorov; Andrey M. Kokotin; Walter V. Pogosov; Valery V. Ryazanov; Mikhail Yu. Kupriyanov; A.A. Golubov; Dimitri Roditchev

doi:10.1038/S43246-020-0037-Y

Josephson current mediated by ballistic topological states in Bi₂Te_2.3Se_0.7 single nanocrystals

Vasily S. Stolyarov^*, Dmitry Yakovlev, S. N. Kozlov, Olga V. Skryabina, Dmitry S. Lvov, Amir I. Gumarov, O.V. Emelyanova, P. S. Dzhumaev, I. V. Shchetinin, R. A. Hovhannisyan, S. V. Egorov, Andrey M. Kokotin, Walter V. Pogosov, Valery V. Ryazanov, Mikhail Yu. Kupriyanov, A.A. Golubov, Dimitri Roditchev

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

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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.

Original language	English
Article number	38
Pages (from-to)	1-11
Number of pages	11
Journal	Communications Materials
Volume	1
DOIs	https://doi.org/10.1038/S43246-020-0037-Y
Publication status	Published - 2 Jul 2020

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Stolyarov, V. S., Yakovlev, D., Kozlov, S. N., Skryabina, O. V., Lvov, D. S., Gumarov, A. I., Emelyanova, O. V., Dzhumaev, P. S., Shchetinin, I. V., Hovhannisyan, R. A., Egorov, S. V., Kokotin, A. M., Pogosov, W. V., Ryazanov, V. V., Kupriyanov, M. Y., Golubov, A. A., & Roditchev, D. (2020). Josephson current mediated by ballistic topological states in Bi₂Te_2.3Se_0.7 single nanocrystals. Communications Materials, 1, 1-11. [38]. https://doi.org/10.1038/S43246-020-0037-Y

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title = "Josephson current mediated by ballistic topological states in Bi2Te2.3Se0.7 single nanocrystals",

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.",

author = "Stolyarov, {Vasily S.} and Dmitry Yakovlev and Kozlov, {S. N.} and Skryabina, {Olga V.} and Lvov, {Dmitry S.} and Gumarov, {Amir I.} and O.V. Emelyanova and Dzhumaev, {P. S.} and Shchetinin, {I. V.} and Hovhannisyan, {R. A.} and Egorov, {S. V.} and Kokotin, {Andrey M.} and Pogosov, {Walter V.} and Ryazanov, {Valery V.} and Kupriyanov, {Mikhail Yu.} and A.A. Golubov and Dimitri Roditchev",

year = "2020",

month = jul,

day = "2",

doi = "10.1038/S43246-020-0037-Y",

language = "English",

volume = "1",

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journal = "Communications Materials",

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Stolyarov, VS, Yakovlev, D, Kozlov, SN, Skryabina, OV, Lvov, DS, Gumarov, AI, Emelyanova, OV, Dzhumaev, PS, Shchetinin, IV, Hovhannisyan, RA, Egorov, SV, Kokotin, AM, Pogosov, WV, Ryazanov, VV, Kupriyanov, MY, Golubov, AA & Roditchev, D 2020, 'Josephson current mediated by ballistic topological states in Bi₂Te_2.3Se_0.7 single nanocrystals', Communications Materials, vol. 1, 38, pp. 1-11. https://doi.org/10.1038/S43246-020-0037-Y

TY - JOUR

T1 - Josephson current mediated by ballistic topological states in Bi2Te2.3Se0.7 single nanocrystals

AU - Stolyarov, Vasily S.

AU - Yakovlev, Dmitry

AU - Kozlov, S. N.

AU - Skryabina, Olga V.

AU - Lvov, Dmitry S.

AU - Gumarov, Amir I.

AU - Emelyanova, O.V.

AU - Dzhumaev, P. S.

AU - Shchetinin, I. V.

AU - Hovhannisyan, R. A.

AU - Egorov, S. V.

AU - Kokotin, Andrey M.

AU - Pogosov, Walter V.

AU - Ryazanov, Valery V.

AU - Kupriyanov, Mikhail Yu.

AU - Golubov, A.A.

AU - Roditchev, Dimitri

PY - 2020/7/2

Y1 - 2020/7/2

N2 - 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.

AB - 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.

U2 - 10.1038/S43246-020-0037-Y

DO - 10.1038/S43246-020-0037-Y

M3 - Article

VL - 1

SP - 1

EP - 11

JO - Communications Materials

JF - Communications Materials

SN - 2662-4443

M1 - 38

ER -

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 Bi₂Te_2.3Se_0.7 single nanocrystals