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Atomic manipulation of in-gap states in the beta-Bi2Pd superconductor

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Title
Atomic manipulation of in-gap states in the beta-Bi2Pd superconductor
Author(s)
Mier, Cristina; Jiyoon Hwang; Jinkyung Kim; Yujeong Bae; Nabeshima, Fuyuki; Imai, Yoshinori; Maeda, Atsutaka; Lorente, Nicolas; Andreas Heinrich; Choi, Deung-Jang
Publication Date
2021-07
Journal
PHYSICAL REVIEW B, v.104, no.4
Publisher
AMER PHYSICAL SOC
Abstract
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 beta-Bi2Pd 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 root 2. lattice parameters. Of these, only the second one is in a topologically nontrivial phase, in agreement with the spin interactions for this geometry.
URI
https://pr.ibs.re.kr/handle/8788114/10076
DOI
10.1103/PhysRevB.104.045406
ISSN
2469-9950
Appears in Collections:
Center for Quantum Nanoscience(양자나노과학 연구단) > 1. Journal Papers (저널논문)
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