Regensburg 2025 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 36: Nanotubes, BEC, Cryocoolers: Poster
TT 36.1: Poster
Wednesday, March 19, 2025, 15:00–18:00, P3
Quantum Dot Spectroscopy in Suspended MoS2 Nanotubes — •Stefan B. Obloh1, Robin T. K. Schock1, Jonathan Neuwald1, Matthias Kronseder1, Matjaž Malok2, Maja Remškar2, and Andreas K. Hüttel1 — 1Institute for Experimental and Applied Physics, University of Regensburg, 93040 Regensburg, Germany — 2Solid State Physics Department, Institute Jožef Stefan,1000 Ljubljana, Slovenia
MoS2 as a semiconductor has attracted a lot of attention due to its 2D nature, strong spin-orbin coupling, broken inversion symmetry, and spin-split bands. By tuning the carrier density in MoS2 with ionic liquid gating, intrinsic superconuctivity has been achieved [1]. Recent works were able to demonstrate single level transport in planar [2,3] and nanotube-based [4] devices. A remaining challenge lies in reducing the effects of substrate inhomogenity and surface charges, resulting in disordered quantum dots. To mitigate this, one can suspend the tubes above the substrate or shield them from the amorphous SiO2. We show quantum dot transport measurements of suspended nanotubes as well as insights into fabrication challenges regarding this approach.
[1] J. T. Ye et al., Science 338, 1193 (2012).
[2] R. Krishnan et al., Nano Lett. 23, 6171 (2023).
[3] P.Kumar et al., Nanoscale 15, 18023 (2023).
[4] R. T. K. Schock et al., Adv. Mat. 35, 13 (2023).
Keywords: MoS\textsubscript{2}; quantum dots; nanotubes; Coulomb blockade; transport spectroscopy