Schock Robin T K, Neuwald Jonathan, Möckel Wolfgang, Kronseder Matthias, Pirker Luka, Remškar Maja, Hüttel Andreas K
Institute for Experimental and Applied Physics, University of Regensburg, 93040, Regensburg, Germany.
Solid State Physics Department, Jožef Stefan Institute, 1000, Ljubljana, Slovenia.
Adv Mater. 2023 Mar;35(13):e2209333. doi: 10.1002/adma.202209333. Epub 2023 Feb 21.
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 kΩ 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.
二硫化钼纳米带和纳米管是具有强自旋轨道相互作用的准一维半导体，是一种在量子电子应用方面极具潜力的纳米材料。在此，证明了在接触金属与这种纳米材料之间的铋半金属层极大地改善了接触性能。在室温下观察到约100 kΩ量级的两点电阻。在低温下，库仑阻塞现象明显。与之前使用低功函数金属作为接触的器件相比，所得的稳定性图表明接触处明显不存在陷阱态及相应的无序现象。在低于100 mK的温度下观察到单能级量子输运。
