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arXiv · 2209.15515

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

R. T. K. Schock·J. Neuwald·W. Möckel·M. Kronseder·L. Pirker·M. Remškar·A. K. Hüttel
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Abstract

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 100k$\Omega$ 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 100mK.

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R. T. K. Schock, J. Neuwald, W. Möckel, M. Kronseder, L. Pirker, M. Remškar, A. K. Hüttel. 2022-09-30. Non-Destructive Low-Temperature Contacts to MoS2 Nanoribbon and Nanotube Quantum Dots. https://doi.org/10.1002/adma.202209333

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