Superconducting Quantum Interference in Twisted van der Waals Heterostructures

Liam S. Farrar; Aimee Nevill; Zhen Jieh Lim; Geetha Balakrishnan; Sara Dale; Simon J. Bending

doi:10.1021/acs.nanolett.1c00152

Superconducting Quantum Interference in Twisted van der Waals Heterostructures

Liam S. Farrar, Aimee Nevill, Zhen Jieh Lim, Geetha Balakrishnan, Sara Dale, Simon J. Bending

University of Warwick

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

23 Citations (SciVal)

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 Δc ∼75% and ΔV ∼1.4 mV, respectively.

Original language	English
Pages (from-to)	6725-6731
Number of pages	7
Journal	Nano Letters
Volume	21
Issue number	16
Early online date	16 Aug 2021
DOIs	https://doi.org/10.1021/acs.nanolett.1c00152
Publication status	Published - 25 Aug 2021

Bibliographical note

Funding Information:
The authors thank Peter Heard at the IAC, University of Bristol, for their useful discussions and supporting work at the early phases of this study. The research was funded by the Bath/Bristol Centre for Doctoral Training in Condensed Matter Physics, under the EPSRC (UK) grant no. EP/L015544. The work at the University of Warwick is supported through EPSRC grant no. EP/T005963/1. A.N., Z.J.L., and S.D. acknowledge financial support from the Royal Society.

Funding

The authors thank Peter Heard at the IAC, University of Bristol, for their useful discussions and supporting work at the early phases of this study. The research was funded by the Bath/Bristol Centre for Doctoral Training in Condensed Matter Physics, under the EPSRC (UK) grant no. EP/L015544. The work at the University of Warwick is supported through EPSRC grant no. EP/T005963/1. A.N., Z.J.L., and S.D. acknowledge financial support from the Royal Society.

Keywords

Josephson junction
NbSe
Superconducting quantum interference device
Two-dimensional materials
Van der Waal heterostructures

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

Access to Document

10.1021/acs.nanolett.1c00152Licence: CC BY

Cite this

@article{444cd76f22944349baaf557ee9ae243c,

title = "Superconducting Quantum Interference in Twisted van der Waals Heterostructures",

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 Δc ∼75% and ΔV ∼1.4 mV, respectively. ",

keywords = "Josephson junction, NbSe, Superconducting quantum interference device, Two-dimensional materials, Van der Waal heterostructures",

author = "Farrar, {Liam S.} and Aimee Nevill and Lim, {Zhen Jieh} and Geetha Balakrishnan and Sara Dale and Bending, {Simon J.}",

note = "Funding Information: The authors thank Peter Heard at the IAC, University of Bristol, for their useful discussions and supporting work at the early phases of this study. The research was funded by the Bath/Bristol Centre for Doctoral Training in Condensed Matter Physics, under the EPSRC (UK) grant no. EP/L015544. The work at the University of Warwick is supported through EPSRC grant no. EP/T005963/1. A.N., Z.J.L., and S.D. acknowledge financial support from the Royal Society. ",

year = "2021",

month = aug,

day = "25",

doi = "10.1021/acs.nanolett.1c00152",

language = "English",

volume = "21",

pages = "6725--6731",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

number = "16",

}

TY - JOUR

T1 - Superconducting Quantum Interference in Twisted van der Waals Heterostructures

AU - Farrar, Liam S.

AU - Nevill, Aimee

AU - Lim, Zhen Jieh

AU - Balakrishnan, Geetha

AU - Dale, Sara

AU - Bending, Simon J.

N1 - Funding Information: The authors thank Peter Heard at the IAC, University of Bristol, for their useful discussions and supporting work at the early phases of this study. The research was funded by the Bath/Bristol Centre for Doctoral Training in Condensed Matter Physics, under the EPSRC (UK) grant no. EP/L015544. The work at the University of Warwick is supported through EPSRC grant no. EP/T005963/1. A.N., Z.J.L., and S.D. acknowledge financial support from the Royal Society.

PY - 2021/8/25

Y1 - 2021/8/25

N2 - 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 Δc ∼75% and ΔV ∼1.4 mV, respectively.

AB - 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 Δc ∼75% and ΔV ∼1.4 mV, respectively.

KW - Josephson junction

KW - NbSe

KW - Superconducting quantum interference device

KW - Two-dimensional materials

KW - Van der Waal heterostructures

UR - http://www.scopus.com/inward/record.url?scp=85114324764&partnerID=8YFLogxK

U2 - 10.1021/acs.nanolett.1c00152

DO - 10.1021/acs.nanolett.1c00152

M3 - Article

AN - SCOPUS:85114324764

SN - 1530-6984

VL - 21

SP - 6725

EP - 6731

JO - Nano Letters

JF - Nano Letters

IS - 16

ER -

Superconducting Quantum Interference in Twisted van der Waals Heterostructures

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Graphene Nanosensors for Scanning Hall Microscopy and Susceptometry

EPSRC Centre for Doctoral Training in Condensed Matter Physics

Dataset for "Superconducting Quantum Interference in Twisted van der Waals Heterostructures"

Cite this

Superconducting Quantum Interference in Twisted van der Waals Heterostructures

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Projects

Graphene Nanosensors for Scanning Hall Microscopy and Susceptometry

EPSRC Centre for Doctoral Training in Condensed Matter Physics

Datasets

Dataset for "Superconducting Quantum Interference in Twisted van der Waals Heterostructures"

Cite this