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

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Hybrid semiconductor-superconductor nanowires are predicted to host Majorana zero modes that induce zero-bias peaks (ZBPs) in tunneling conductance. ZBPs alone, however, are not sufficient evidence due to the ubiquitous presence of Andreev bound states. Here, we implement a strongly resistive normal lead in InAs-Al nanowire devices and show that most of the expected Andreev bound state-induced ZBPs 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 the ZBP phase diagram in future Majorana searches.

Original languageEnglish
Article number076803
JournalPhysical Review Letters
Volume128
Issue number7
DOIs
StatePublished - 18 Feb 2022
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2022 American Physical Society.

Funding

We thank Gleb Finkelstein, Harold Baranger, and Chung-Ting Ke for valuable discussions. Raw data and processing codes within this Letter are available at Ref. . This work is supported by Tsinghua University Initiative Scientific Research Program, National Natural Science Foundation of China (Grants No. 11974198, 92065106, 61974138, and 12004040), Beijing Natural Science Foundation (Grant No. 1192017), and the Alibaba Innovative Research Program. D. P. acknowledges the support from Youth Innovation Promotion Association, Chinese Academy of Sciences (No. 2017156).

FundersFunder number
National Natural Science Foundation of China11974198, 92065106, 12004040, 61974138
Chinese Academy of Sciences2017156
Tsinghua University
Natural Science Foundation of Beijing Municipality1192017
Youth Innovation Promotion Association

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