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Jeon, Sangjun; Xie, Yonglong; Li, Jian; Wang, Zhijun; Bernevig, B. Andrei; Yazdani, Ali
Science (American Association for the Advancement of Science), 11/2017, Letnik: 358, Številka: 6364Journal Article
One-dimensional topological superconductors host Majorana zero modes (MZMs), the nonlocal property of which could be exploited for quantum computing applications. We use spin-polarized scanning tunneling microscopy to show that MZMs realized in self-assembled Fe chains on the surface of Pb have a spin polarization that exceeds that stemming from the magnetism of these chains. This feature, captured by our model calculations, is a direct consequence of the nonlocality of the Hilbert space of MZMs emerging from a topological band structure. Our study establishes spin-polarization measurements as a diagnostic tool to distinguish topological MZMs from trivial in-gap states of a superconductor.
