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arXiv · 2205.06736

Plateau regions for zero-bias peaks within 5% of the quantized conductance value $2e^2/h$

Zhaoyu Wang·Huading Song·Dong Pan·Zitong Zhang·Wentao Miao·Ruidong Li·Zhan Cao·Gu Zhang·Lei Liu·Lianjun Wen·Ran Zhuo·Dong E. Liu·Ke He·Runan Shang·Jianhua Zhao·Hao Zhang
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Abstract

Probing an isolated Majorana zero mode is predicted to reveal a tunneling conductance quantized at $2e^2/h$ at zero temperature. Experimentally, a zero-bias peak (ZBP) is expected and its height should remain robust against relevant parameter tuning, forming a quantized plateau. Here, we report the observation of large ZBPs in a thin InAs-Al hybrid nanowire device. The ZBP height can stick close to $2e^2/h$, mostly within $5\%$ tolerance, by sweeping gate voltages and magnetic field. We further map out the phase diagram and identify two plateau regions in the phase space. Despite the presence of disorder and quantum dots, our result constitutes a step forward towards establishing Majorana zero modes.

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Zhaoyu Wang, Huading Song, Dong Pan, Zitong Zhang, Wentao Miao, Ruidong Li, Zhan Cao, Gu Zhang, Lei Liu, Lianjun Wen, Ran Zhuo, Dong E. Liu, Ke He, Runan Shang, Jianhua Zhao, Hao Zhang. 2022-05-13. Plateau regions for zero-bias peaks within 5% of the quantized conductance value $2e^2/h$. https://doi.org/10.1103/physrevlett.129.167702

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