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
DOI 10.1103/PhysRevB.106.205421 · Physical Review B
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Abstract
The detection of Majorana zero modes still remains elusive after extensive searches. The current debates focus on the experimental observation of large zero-bias peaks (ZBPs) near 2e2/h in tunneling conductance. These large ZBPs, induced by Andreev bound states, mimic the Majorana signature and suggest that new diagnostic tools or experimental knobs are highly desired. In this paper, we introduce an interaction effect on these large ZBPs using a weakly dissipative probe. By increasing temperature (T), we establish that these large ZBPs can reveal a zero-bias conductance increase, a non-Fermi-liquid behavior due to the environmental Coulomb blockade. This observation forms a sharp contrast to nondissipative devices where ZBPs follow a Fermi-liquid T dependence. Our results open prospects for a better understanding of large ZBPs induced by Andreev bound states and hold relevance for future Majorana detection.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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