Verzhbitskiy, I. A., Mishra, A., Mitra, S., Zhang, Z., Das, S., Lau, C. S., Lee, R., Huang, D., Eda, G., Ang, Y. S., & Goh, K. E. J. (2025). Low-Temperature Contacts and the Coulomb Blockade Effect in Layered Nanoribbons with In-Plane Anisotropy. ACS Nano, 19(11), 10878–10888. https://doi.org/10.1021/acsnano.4c15086
Abstract:
One-dimensional (1D) nanoribbons (NRs) constitute rapidly advancing nanotechnology with significant potential for emerging applications such as quantum sensing and metrology. TiS3 nanoribbons exhibit strong in-plane crystal anisotropy, enabling robust 1D confinement and resilience to edge disorder. Nevertheless, charge transport in 1D TiS3 remains relatively unexplored, particularly at low temperatures, where high contact resistance impacts device performance and fundamentally limits its applications. Here, we engineer electrical contacts between a bulk metal and a 1D NR and explore the low-temperature characteristics of the 1D field-effect devices. We report ohmic contacts for 1D TiS3 with temperature-independent contact resistances as low as 2.7 ± 0.3 kΩ·μm, enabling the study of charge transport at low temperatures (down to 35 mK) and clear observation of the Coulomb blockade effect. We demonstrate single-electron transport in 1D TiS3 and perform excited state spectroscopy and magnetospectroscopy, extracting an out-of-plane electron g-factor, g = 1.8 ± 0.3.
License type:
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Funding Info:
This research / project is supported by the Agency for Science, Technology, and Research - NA
Grant Reference no. : #21709
This research / project is supported by the Agency for Science, Technology, and Research - NA
Grant Reference no. : C230917006
This research / project is supported by the Agency for Science, Technology, and Research - NA
Grant Reference no. : C230917007
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 Ministry of Education - Academic Research Fund Tier 2 Grant
Grant Reference no. : MOE-T2EP50221-0019
This research / project is supported by the Singapore Management University, Singapore University of Technology and Design - SMU-SUTD Joint Grant
Grant Reference no. : 22-SIS-SMU-054
This research / project is supported by the Agency for Science, Technology, and Research - Manufacturing, Trade, and Connectivity Young Individual Research Grants
Grant Reference no. : M21K3c0124
This research / project is supported by the Agency for Science, Technology, and Research - Manufacturing, Trade, and Connectivity Individual Research Grants
Grant Reference no. : M23M6c0103
This research / project is supported by the Agency for Science, Technology, and Research - Manufacturing, Trade, and Connectivity Young Individual Research Grants
Grant Reference no. : M22K3c0105
This research / project is supported by the Ministry of Education - Academic Research Fund Tier 3 Grant
Grant Reference no. : MOE2018-T3-1-005
This research / project is supported by the Ministry of Education - Academic Research Fund Tier 1 Grant
Grant Reference no. : A-8001995-00-00
This research / project is supported by the Agency for Science, Technology, and Research - NA
Grant Reference no. : C222812022