Atomic manipulation of in-gap states in theβ−Bi2Pdsuperconductor
| Autor: | Jiyoon Hwang, Deung-Jang Choi, Jinkyung Kim, Andreas J. Heinrich, Cristina Mier, Atsutaka Maeda, Fuyuki Nabeshima, Yoshinori Imai, Nicolás Lorente, Yujeong Bae |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Physical Review B. 104 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | Electronic states in the gap of a superconductor inherit intriguing many-body properties from the superconductor. Here, we create these in-gap states by manipulating Cr atomic chains on the $\ensuremath{\beta}\ensuremath{-}\mathrm{Bi}{}_{2}\mathrm{Pd}$ superconductor. We find that the topological properties of the in-gap states can greatly vary depending on the crafted spin chain. These systems make an ideal platform for nontrivial topological phases because of the large atom-superconductor interactions and the existence of a large Rashba coupling at the Bi-terminated surface. We study two spin chains, one with atoms two lattice parameters apart and one with $\sqrt{2}$ lattice parameters. Of these, only the second one is in a topologically nontrivial phase, in agreement with the spin interactions for this geometry. |
| Databáze: | OpenAIRE |
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