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Superconducting quantum interference in twisted van der Waals heterostructures
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Farrar, Liam S., Nevill, Aimee, Lim, Zhen Jieh, Balakrishnan, Geetha, Dale, Sara and Bending, Simon J. (2021) Superconducting quantum interference in twisted van der Waals heterostructures. Nano Letters, 21 (16). pp. 6725-6731. doi:10.1021/acs.nanolett.1c00152 ISSN 1530-6984.
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Official URL: http://dx.doi.org/10.1021/acs.nanolett.1c00152
Abstract
We demonstrate the formation of both Josephson junctions and superconducting quantum interference devices (SQUIDs) using a dry transfer technique to stack and deterministically misalign mechanically exfoliated flakes of NbSe2. The current−voltage characteristics of the resulting twisted NbSe2− NbSe2 junctions are found to be sensitive to the misalignment angle of the crystallographic axes, opening up a new control parameter for optimization of the device performance, which is not available in thin-film-deposited junctions. A single lithographic process has then been implemented to shape Josephson junctions into SQUID geometries with typical loop areas of ∼25 μm2 and weak links ∼600 nm wide. At T = 3.75 K in an applied magnetic field, these devices display large stable current and voltage modulation depths of up to ΔIc ∼ 75% and ΔV ∼ 1.4 mV, respectively.
| Item Type: | Journal Article | ||||||||||||
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| Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||
| Library of Congress Subject Headings (LCSH): | Heterostructures, Josephson junctions, Superconducting quantum interference devices, Two-dimensional materials | ||||||||||||
| Journal or Publication Title: | Nano Letters | ||||||||||||
| Publisher: | American Chemical Society | ||||||||||||
| ISSN: | 1530-6984 | ||||||||||||
| Official Date: | 16 August 2021 | ||||||||||||
| Dates: |
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| Volume: | 21 | ||||||||||||
| Number: | 16 | ||||||||||||
| Page Range: | pp. 6725-6731 | ||||||||||||
| DOI: | 10.1021/acs.nanolett.1c00152 | ||||||||||||
| Status: | Peer Reviewed | ||||||||||||
| Publication Status: | Published | ||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||
| Date of first compliant deposit: | 12 October 2021 | ||||||||||||
| Date of first compliant Open Access: | 13 October 2021 | ||||||||||||
| RIOXX Funder/Project Grant: |
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