Nanoironing van der Waals Heterostructures toward Electrically Controlled Quantum Dots

Nanoironing van der Waals Heterostructures toward Electrically Controlled Quantum Dots

ACS Applied Materials & Interfaces

10.1021/acsami.4c03639

http://dx.doi.org/10.1021/acsami.4c03639

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

06 June 2024

Talha-Dean, T., Tarn, Y., Mukherjee, S., John, J. W., Huang, D., Verzhbitskiy, I. A., Venkatakrishnarao, D., Das, S., Lee, R., Mishra, A., Wang, S., Ang, Y. S., Johnson Goh, K. E., & Lau, C. S. (2024). Nanoironing van der Waals Heterostructures toward Electrically Controlled Quantum Dots. ACS Applied Materials & Interfaces, 16(24), 31738–31746. https://doi.org/10.1021/acsami.4c03639

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 WS2 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.

Publisher Copyright

This research / project is supported by the A*STAR - MTC Young Individual Research Grants
Grant Reference no. : M21K3c0124

This research / project is supported by the A*STAR - Career Development Award
Grant Reference no. : C222812022

This research / project is supported by the A*STAR - NA
Grant Reference no. : #21709, C230917006, C230917007

This research / project is supported by the Ministry of Education - Tier 2
Grant Reference no. : MOE-T2EP50221-0019

This research / project is supported by the National Research Foundation - Competitive Research Programme
Grant Reference no. : CRP21-2018-0001

This research / project is supported by the A*STAR - MTC Young Individual Research Grants
Grant Reference no. : M22K3c0105

This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see doi.org/10.1021/acsami.4c03639

https://oar.a-star.edu.sg/communities-collections/articles/20222

1944-8244
1944-8252

Institute of Materials Research & Engineering