Conductance Quantization in PbTe Nanowires
| Autor: | Song, Wenyu, Wang, Yuhao, Miao, Wentao, Yu, Zehao, Gao, Yichun, Li, Ruidong, Yang, Shuai, Chen, Fangting, Geng, Zuhan, Zhang, Zitong, Zhang, Shan, Zang, Yunyi, Cao, Zhan, Liu, Dong E., Shang, Runan, Feng, Xiao, Li, Lin, Xue, Qi-Kun, He, Ke, Zhang, Hao |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 108, 045426 (2023) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.108.045426 |
| Popis: | PbTe nanowires coupled to a superconductor have recently been proposed as a potential Majorana platform. The hallmark of the one-dimensional nature of ballistic nanowires is their quantized conductance. Here, we report the observation of conductance plateaus at multiples of the quantized value $2e^2/h$ in PbTe nanowires at finite magnetic fields. The quantized plateaus, as a function of source-drain bias and magnetic field, allow for the extraction of the Land\'e $g$-factor, sub-band spacing and effective mass. The coefficient of 2 in the plateau conductance indicates the presence of valley degeneracy arising from the crystal orientation of the nanowires, which are grown on a (001) substrate. Occasionally, this degeneracy can be lifted by a gate voltage that breaks the mirror symmetry. Our results demonstrate the one-dimensionality of PbTe nanowires and fulfill one of the necessary conditions for the realization of Majorana zero modes. Comment: Raw data and processing codes within this paper are available at: https://doi.org/10.5281/zenodo.7848599 |
| Databáze: | arXiv |
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