Nanoironing van der Waals Heterostructures toward Electrically Controlled Quantum Dots

Teymour Talha-Dean; Yaoju Tarn; Subhrajit Mukherjee; John Wellington John; Ding Huang; Ivan A. Verzhbitskiy; Dasari Venkatakrishnarao; Sarthak Das; Rainer Lee; Abhishek Mishra; Shuhua Wang; Yee Sin Ang; Kuan Eng Johnson Goh; Chit Siong Lau

doi:10.1021/acsami.4c03639

journal article·2024-06-19

Nanoironing van der Waals Heterostructures toward Electrically Controlled Quantum Dots

Teymour Talha-Dean, Yaoju Tarn, Subhrajit Mukherjee, John Wellington John, Ding Huang, Ivan A. Verzhbitskiy, Dasari Venkatakrishnarao, Sarthak Das, Rainer Lee, Abhishek Mishra, Shuhua Wang, Yee Sin Ang, Kuan Eng Johnson Goh, Chit Siong Lau

ACS Applied Materials & Interfaces· Volume 16· Issue 24

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Source abstract

Abstract

Assembling two-dimensional van der Waals (vdW)-layered materials into heterostructures is an exciting development that sparked the discovery of rich correlated electronic phenomena. vdW heterostructures also offer possibilities for designer device applications in areas such as optoelectronics, valley- and spintronics, and quantum technology. However, realizing the full potential of these heterostructures requires interfaces with exceptionally low disorder which is challenging to engineer. Here, we show that thermal scanning probes can be used to create pristine interfaces in vdW heterostructures. Our approach is compatible at both the material- and device levels, and monolayer WS 2 transistors show up to an order of magnitude improvement in electrical performance from this technique. We also demonstrate vdW heterostructures with low interface disorder enabling the electrical formation and control of quantum dots that can be tuned from macroscopic current flow to the single-electron tunneling regime.

Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials Electronic materials

OpenAlex topics: Graphene research and applications · 2D Materials and Applications · Quantum and electron transport phenomena

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore 138634, Republic of Singapore

Department of Physics and Astronomy, Queen Mary University of London, London E1 4NS, U.K.

Science, Mathematics and Technology, Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372, Singapore

Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore

Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore

Funding

Agency for Science, Technology and Research · National Research Foundation Singapore

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