Spatial extension and coupling of magnetic bound states in the superconducting topological crystalline insulator SnTe
Shuai Shao, Yiqi Wang, Hongyuan Chen, Jie Cai, Xiaolong Ma, Jinan Chen, Ruijun Xi, DanDan Guan, Xiaoxue Liu, Liang Liu, ShiYong Wang, CanHua Liu, YaoYi Li, Hao Zheng, Hao Yang, JinFeng Jia
DOI 10.1103/7hfc-5ml1 · Physical Review B
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Abstract
Recent studies in the superconducting topological crystalline insulator (TCI) SnTe have reported signatures of multiple Majorana zero modes in a vortex. The energy and spatial characteristics of magnetic bound states in this platform are important for understanding their mechanism and building topological quantum states. Here, we investigate the Yu-Shiba-Rusinov (YSR) bound states induced by magnetic adatoms on a SnTe/Pb heterostructure, revealing their latticelike spatial extension, which is associated with the topological surface states of the TCI. We also reveal identical oscillation periods and energy-dependent spatial extensions of YSR states at different excitation energies. Moreover, we observe one-dimensional (1D) dispersive in-gap states with zero-energy crossings around the magnetic cluster, arising from the coupling of long-range magnetic bound states and suggesting possible 1D topologically nontrivial zero-energy states. Our work offers a comprehensive understanding of magnetic bound states in the superconducting TCIs, proposing a promising platform to engineer nonlocal topological quantum states through long-range magnetic coupling.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SnTe 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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