Suppressing Andreev Bound State Zero Bias Peaks Using a Strongly Dissipative Lead.
Suppressing Andreev Bound State Zero Bias Peaks Using a Strongly Dissipative Lead.
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DOI：
10.1103/physrevlett.128.076803
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发表时间：
2021-10
影响因子：
8.6
通讯作者：
Sha Zhang;Zhi-cheng Wang;D. Pan;Hang Li;S. Lu;Zonglin Li;Gu Zhang;Donghao Liu;Zhan-qiang Cao;Lei Liu;Lianjun Wen;Dunyuan Liao;Ran Zhuo;Runan Shang;Donghao Liu;Jianhua Zhao;Haoqing Zhang
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文献类型：
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作者：
Sha Zhang;Zhi-cheng Wang;D. Pan;Hang Li;S. Lu;Zonglin Li;Gu Zhang;Donghao Liu;Zhan-qiang Cao;Lei Liu;Lianjun Wen;Dunyuan Liao;Ran Zhuo;Runan Shang;Donghao Liu;Jianhua Zhao;Haoqing Zhang
半导体-超导体混合纳米线预计将包含在隧道电导中诱导零偏压峰(ZBP)的Majorana零模。然而，由于安德列夫束缚态的普遍存在，ZBP本身并不是充分的证据。在这里，我们在InAs-Al纳米线器件中实现了一种强阻正铅，并证明了大多数预期的Andreev束缚态诱导的ZBP都可以被抑制，这种现象被称为环境库仑阻塞。我们的结果是第一次实验证明了这种耗散相互作用对Andreev束缚态的影响，并可能在未来的Majorana搜索中作为一个过滤器来缩小ZBP相图的范围。
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.