Non-Destructive Low-Temperature Contacts to MoS2 Nanoribbon and Nanotube Quantum Dots

0570629 - ÚFCH JH 2024 RIV DE eng J - Journal Article
Schock, R. T. K. - Neuwald, J. - Moeckel, W. - Kronseder, M. - Pirker, Luka - Remškar, M. - Huettel, A. K. K.
Non-Destructive Low-Temperature Contacts to MoS2 Nanoribbon and Nanotube Quantum Dots.
Advanced Materials. Roč. 35, č. 13 (2023), č. článku 2209333. ISSN 0935-9648. E-ISSN 1521-4095
Institutional support: RVO:61388955
Keywords : bismuth * nanotubes * molybdenum disulfide * quantum confinement * quantum dots
OECD category: Physical chemistry
Impact factor: 29.4, year: 2022
Method of publishing: Open access

Molybdenum disulfide nanoribbons and nanotubes are quasi-1D semiconductors with strong spin-orbit interaction, a nanomaterial highly promising for quantum electronic applications. Here, it is demonstrated that a bismuth semimetal layer between the contact metal and this nanomaterial strongly improves the properties of the contacts. Two-point resistances on the order of 100 k omega are observed at room temperature. At cryogenic temperature, Coulomb blockade is visible. The resulting stability diagrams indicate a marked absence of trap states at the contacts and the corresponding disorder, compared to previous devices that use low-work-function metals as contacts. Single-level quantum transport is observed at temperatures below 100 mK.
Permanent Link: https://hdl.handle.net/11104/0341936