Quantized Andreev conductance in semiconductor nanowires
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866909657709150208 |
|---|---|
| author | Gao, Yichun Song, Wenyu Wang, Yuhao Geng, Zuhan Cao, Zhan Yu, Zehao Yang, Shuai Xu, Jiaye Chen, Fangting Li, Zonglin Li, Ruidong Yang, Lining Wang, Zhaoyu Zhang, Shan Feng, Xiao Wang, Tiantian Zang, Yunyi Li, Lin Liu, Dong E. Shang, Runan Xue, Qi-Kun He, Ke Zhang, Hao |
| author_facet | Gao, Yichun Song, Wenyu Wang, Yuhao Geng, Zuhan Cao, Zhan Yu, Zehao Yang, Shuai Xu, Jiaye Chen, Fangting Li, Zonglin Li, Ruidong Yang, Lining Wang, Zhaoyu Zhang, Shan Feng, Xiao Wang, Tiantian Zang, Yunyi Li, Lin Liu, Dong E. Shang, Runan Xue, Qi-Kun He, Ke Zhang, Hao |
| contents | Clean one-dimensional electron systems can exhibit quantized conductance. The plateau conductance doubles if the transport is dominated by Andreev reflection. Here, we report quantized conductance observed in both Andreev and normal-state transports in PbTe-Pb and PbTe-In hybrid nanowires. The Andreev plateau is observed at $4e^2/h$, twice of the normal plateau value of $2e^2/h$. In comparison, Andreev conductance in the best-optimized III-V nanowires is non-quantized due to mode-mixing induced dips (a disorder effect), despite the quantization of normal-state transport. The negligible mode mixing in PbTe hybrids indicates an unprecedented low-disorder transport regime for nanowire devices, beneficial for Majorana researches. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_11211 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quantized Andreev conductance in semiconductor nanowires Gao, Yichun Song, Wenyu Wang, Yuhao Geng, Zuhan Cao, Zhan Yu, Zehao Yang, Shuai Xu, Jiaye Chen, Fangting Li, Zonglin Li, Ruidong Yang, Lining Wang, Zhaoyu Zhang, Shan Feng, Xiao Wang, Tiantian Zang, Yunyi Li, Lin Liu, Dong E. Shang, Runan Xue, Qi-Kun He, Ke Zhang, Hao Mesoscale and Nanoscale Physics Materials Science Superconductivity Clean one-dimensional electron systems can exhibit quantized conductance. The plateau conductance doubles if the transport is dominated by Andreev reflection. Here, we report quantized conductance observed in both Andreev and normal-state transports in PbTe-Pb and PbTe-In hybrid nanowires. The Andreev plateau is observed at $4e^2/h$, twice of the normal plateau value of $2e^2/h$. In comparison, Andreev conductance in the best-optimized III-V nanowires is non-quantized due to mode-mixing induced dips (a disorder effect), despite the quantization of normal-state transport. The negligible mode mixing in PbTe hybrids indicates an unprecedented low-disorder transport regime for nanowire devices, beneficial for Majorana researches. |
| title | Quantized Andreev conductance in semiconductor nanowires |
| topic | Mesoscale and Nanoscale Physics Materials Science Superconductivity |
| url | https://arxiv.org/abs/2406.11211 |