'Magic' of twisted multi-layered graphene and 2D nano-heterostructures
'Magic' of twisted multi-layered graphene and 2D nano-heterostructures
Two-dimensional materials with a single or few layers are exciting nano-scale materials that exhibit unprecedented multi-functional properties including optical, electronic, thermal, chemical and mechanical characteristics. A single layer of different 2D materials or a few layers of the same material may not always have the desired application-specific properties to an optimal level. In this context, a new trend has started gaining prominence lately to develop engineered nano-heterostructures by algorithmically stacking multiple layers of single or different 2D materials, wherein each layer could further have individual twisting angles. The enormous possibilities of forming heterostructures through combining a large number of 2D materials with different numbers, stacking sequences and twisting angles have expanded the scope of nano-scale design well beyond considering only a 2D material mono-layer with a specific set of given properties. Magic angle twisted bilayer graphene (BLG), a functional variant of van der Waals heterostructures, has created a buzz recently since it achieves unconventional superconductivity and Mott insulation at around 1.1∘ twist angle. These findings have ignited the interest of researchers to explore a whole new family of 2D heterostructures by introducing twists between layers to tune and enhance various multi-physical properties individually as well as their weighted compound goals. Here we aim to abridge outcomes of the relevant literature concerning twist-dependent physical properties of BLG and other multi-layered heterostructures, and subsequently highlight their broad-spectrum potential in critical engineering applications. The evolving trends and challenges have been critically analysed along with insightful perspectives on the potential direction of future research.
2D materials, magic angle, superconductivity, twisted bilayer graphene, twistronics, van der Waals heterostructures
Saumya, K.
3891b8a0-c4f4-42ca-9ac8-c24f75ef2ca9
Naskar, S.
5f787953-b062-4774-a28b-473bd19254b1
Mukhopadhyay, T.
2ae18ab0-7477-40ac-ae22-76face7be475
5 September 2023
Saumya, K.
3891b8a0-c4f4-42ca-9ac8-c24f75ef2ca9
Naskar, S.
5f787953-b062-4774-a28b-473bd19254b1
Mukhopadhyay, T.
2ae18ab0-7477-40ac-ae22-76face7be475
Saumya, K., Naskar, S. and Mukhopadhyay, T.
(2023)
'Magic' of twisted multi-layered graphene and 2D nano-heterostructures.
Nano Futures, 7 (3), [032005].
(doi:10.1088/2399-1984/acf0a9).
Abstract
Two-dimensional materials with a single or few layers are exciting nano-scale materials that exhibit unprecedented multi-functional properties including optical, electronic, thermal, chemical and mechanical characteristics. A single layer of different 2D materials or a few layers of the same material may not always have the desired application-specific properties to an optimal level. In this context, a new trend has started gaining prominence lately to develop engineered nano-heterostructures by algorithmically stacking multiple layers of single or different 2D materials, wherein each layer could further have individual twisting angles. The enormous possibilities of forming heterostructures through combining a large number of 2D materials with different numbers, stacking sequences and twisting angles have expanded the scope of nano-scale design well beyond considering only a 2D material mono-layer with a specific set of given properties. Magic angle twisted bilayer graphene (BLG), a functional variant of van der Waals heterostructures, has created a buzz recently since it achieves unconventional superconductivity and Mott insulation at around 1.1∘ twist angle. These findings have ignited the interest of researchers to explore a whole new family of 2D heterostructures by introducing twists between layers to tune and enhance various multi-physical properties individually as well as their weighted compound goals. Here we aim to abridge outcomes of the relevant literature concerning twist-dependent physical properties of BLG and other multi-layered heterostructures, and subsequently highlight their broad-spectrum potential in critical engineering applications. The evolving trends and challenges have been critically analysed along with insightful perspectives on the potential direction of future research.
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Accepted/In Press date: 15 August 2023
e-pub ahead of print date: 5 September 2023
Published date: 5 September 2023
Additional Information:
Funding Information:
KS would like to acknowledge the doctoral scholarship received from Ministry of Education (MoE), India. T M acknowledges the initiation grant received from the University of Southampton.
Publisher Copyright:
© 2023 The Author(s). Published by IOP Publishing Ltd.
Keywords:
2D materials, magic angle, superconductivity, twisted bilayer graphene, twistronics, van der Waals heterostructures
Identifiers
Local EPrints ID: 482715
URI: http://eprints.soton.ac.uk/id/eprint/482715
PURE UUID: dba5fcb0-dcfc-49f4-afa9-9b86adadb028
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Date deposited: 11 Oct 2023 16:57
Last modified: 18 Mar 2024 04:10
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Author:
K. Saumya
Author:
T. Mukhopadhyay
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