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arXiv · 2111.00708

Suppressing Andreev bound state zero bias peaks using a strongly dissipative lead

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

Hybrid semiconductor-superconductor nanowires are predicted to host Majorana zero modes, manifested as zero-bias peaks (ZBPs) in tunneling conductance. ZBPs alone, however, are not sufficient evidence due to the ubiquitous presence of Andreev bound states in the same system. Here, we implement a strongly resistive normal lead in our InAs-Al nanowire devices and show that most of the expected ZBPs, corresponding to zero-energy Andreev bound states, can be suppressed, a phenomenon known as environmental Coulomb blockade. Our result is the first experimental demonstration of this dissipative interaction effect on Andreev bound states and can serve as a possible filter to narrow down ZBP phase diagram in future Majorana searches.

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Shan Zhang, Zhichuan Wang, Dong Pan, Hangzhe Li, Shuai Lu, Zonglin Li, Gu Zhang, Donghao Liu, Zhan Cao, Lei Liu, Lianjun Wen, Dunyuan Liao, Ran Zhuo, Runan Shang, Dong E Liu, Jianhua Zhao, Hao Zhang. 2021-11-01. Suppressing Andreev bound state zero bias peaks using a strongly dissipative lead. https://doi.org/10.1103/physrevlett.128.076803

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