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arXiv · 2202.09299

Large Andreev bound state zero bias peaks in a weakly dissipative environment

Zhichuan Wang·Shan Zhang·Dong Pan·Gu Zhang·Zezhou Xia·Zonglin Li·Donghao Liu·Zhan Cao·Lei Liu·Lianjun Wen·Dunyuan Liao·Ran Zhuo·Yongqing Li·Dong E. Liu·Runan Shang·Jianhua Zhao·Hao Zhang
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Abstract

We study Andreev bound states in hybrid InAs-Al nanowire devices. The energy of these states can be tuned to zero by gate voltage or magnetic field, revealing large zero bias peaks (ZBPs) near 2e^2/h in tunneling conductance. Probing these large ZBPs using a weakly dissipative lead reveals non-Fermi liquid temperature (T) dependence due to environmental Coulomb blockade (ECB), an interaction effect from the lead acting on the nanowire junction. By increasing T, these large ZBPs either show a height increase or a transition from split peaks to a ZBP, both deviate significantly from non-dissipative devices where a Fermi-liquid T dependence is revealed. Our result demonstrates the competing effect between ECB and thermal broadening on Andreev bound states.

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Zhichuan Wang, Shan Zhang, Dong Pan, Gu Zhang, Zezhou Xia, Zonglin Li, Donghao Liu, Zhan Cao, Lei Liu, Lianjun Wen, Dunyuan Liao, Ran Zhuo, Yongqing Li, Dong E. Liu, Runan Shang, Jianhua Zhao, Hao Zhang. 2022-02-18. Large Andreev bound state zero bias peaks in a weakly dissipative environment. https://doi.org/10.1103/physrevb.106.205421

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