AI 中文总结
研究利用STM尖端耦合驱动局部边界重整化群流，将动态库仑阻塞作为类马约拉纳零偏压峰的证伪测试。通过实验分析超导能隙和涡旋中心光谱，揭示假阳性拓扑超导涡旋，还解决了双能隙超导问题，表明耗散STM测试动态保护而非光谱外观。
AI 中文摘要
纯净、未分裂的涡旋零偏压峰（ZBPs）可能被误判为马约拉纳零模（MZMs），使静态扫描隧道显微镜本质上具有模糊性。我们利用STM尖端耦合驱动局部边界重整化群（边界RG）流，将动态库仑阻塞转变为对类马约拉纳ZBPs的证伪测试。实验上，在SrSn₃薄膜中，正常态光谱建立了欧姆耗散环境，对超导能隙和涡旋中心光谱进行的边界RG/热力学贝塞耳假设分析在r < 1/2马约拉纳过滤区域内得出一致的耗散强度。降低尖端会使干净、未分裂的涡旋中心ZBP转变为零偏压凹陷，与孤立MZM的受保护流相反，揭示该峰是由传统涡旋核心态产生的马约拉纳假阳性。相同的流选择性地抑制强尖端耦合通道，解决了双能隙超导问题。耗散STM因此测试的是动态保护而非光谱外观。
英文摘要
Clean, nonsplit vortex zero-bias peaks (ZBPs) can be misinterpreted as Majorana zero modes (MZMs), making static scanning tunneling microscopy intrinsically ambiguous. Here we use the STM tip coupling to drive a local boundary-renormalization-group (boundary RG) flow, turning dynamical Coulomb blockade into a falsification test for Majorana-like ZBPs. Experimentally, in a $\mathrm{SrSn}_3$ thin film, normal-state spectra establish an Ohmic dissipative environment, and a common boundary-RG/thermodynamic-Bethe-ansatz analysis of the superconducting-gap and vortex-center spectra yields consistent dissipation strengths within the $r < 1/2$ Majorana-filter regime. Lowering the tip nevertheless drives a clean, non-split vortex-center ZBP into a zero-bias dip, opposite to the protected flow of an isolated MZM, unmasking the peak as a Majorana false positive produced by a conventional vortex-core state. The same flow selectively suppresses the strongly tip-coupled channel, resolving the two-gap superconductivity. Dissipative STM thus tests dynamical protection rather than spectral appearance.
Comments13 pages, 6 figures
