Gate-tunable subband degeneracy in semiconductor nanowires
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866911935378751488 |
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| author | Wang, Yuhao Song, Wenyu Cao, Zhan Yu, Zehao Yang, Shuai Li, Zonglin Gao, Yichun Li, Ruidong Chen, Fangting Geng, Zuhan Yang, Lining Xu, Jiaye Wang, Zhaoyu Zhang, Shan Feng, Xiao Wang, Tiantian Zang, Yunyi Li, Lin Shang, Runan Xue, Qi-Kun Liu, Dong E. He, Ke Zhang, Hao |
| author_facet | Wang, Yuhao Song, Wenyu Cao, Zhan Yu, Zehao Yang, Shuai Li, Zonglin Gao, Yichun Li, Ruidong Chen, Fangting Geng, Zuhan Yang, Lining Xu, Jiaye Wang, Zhaoyu Zhang, Shan Feng, Xiao Wang, Tiantian Zang, Yunyi Li, Lin Shang, Runan Xue, Qi-Kun Liu, Dong E. He, Ke Zhang, Hao |
| contents | Degeneracy and symmetry have a profound relation in quantum systems. Here, we report gate-tunable subband degeneracy in PbTe nanowires with a nearly symmetric cross-sectional shape. The degeneracy is revealed in electron transport by the absence of a quantized plateau. Utilizing a dual gate design, we can apply an electric field to lift the degeneracy, reflected as emergence of the plateau. This degeneracy and its tunable lifting were challenging to observe in previous nanowire experiments, possibly due to disorder. Numerical simulations can qualitatively capture our observation, shedding light on device parameters for future applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_02760 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Gate-tunable subband degeneracy in semiconductor nanowires Wang, Yuhao Song, Wenyu Cao, Zhan Yu, Zehao Yang, Shuai Li, Zonglin Gao, Yichun Li, Ruidong Chen, Fangting Geng, Zuhan Yang, Lining Xu, Jiaye Wang, Zhaoyu Zhang, Shan Feng, Xiao Wang, Tiantian Zang, Yunyi Li, Lin Shang, Runan Xue, Qi-Kun Liu, Dong E. He, Ke Zhang, Hao Mesoscale and Nanoscale Physics Degeneracy and symmetry have a profound relation in quantum systems. Here, we report gate-tunable subband degeneracy in PbTe nanowires with a nearly symmetric cross-sectional shape. The degeneracy is revealed in electron transport by the absence of a quantized plateau. Utilizing a dual gate design, we can apply an electric field to lift the degeneracy, reflected as emergence of the plateau. This degeneracy and its tunable lifting were challenging to observe in previous nanowire experiments, possibly due to disorder. Numerical simulations can qualitatively capture our observation, shedding light on device parameters for future applications. |
| title | Gate-tunable subband degeneracy in semiconductor nanowires |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2404.02760 |