Atomic manipulation of in-gap states in the beta-Bi2Pd superconductor
- 주제(기타) Materials Science, Multidisciplinary
- 주제(기타) Physics, Applied
- 주제(기타) Physics, Condensed Matter
- 설명문(일반) [Mier, Cristina; Lorente, Nicolas; Choi, Deung-Jang] MPC CSIC UPV EHU, Ctr Fis Mat, Donostia San Sebastian 20018, Spain; [Hwang, Jiyoon; Kim, Jinkyung; Bae, Yujeong; Heinrich, Andreas] Inst for Basic Sci Korea, Ctr Quantum Nanosci, Seoul 03760, South Korea; [Hwang, Jiyoon; Kim, Jinkyung; Bae, Yujeong; Heinrich, Andreas] Ewha Womans Univ, Dept Phys, Seoul 03760, South Korea; [Nabeshima, Fuyuki; Imai, Yoshinori; Maeda, Atsutaka] Univ Tokyo, Dept Basic Sci, Meguro Ku, Tokyo 1538902, Japan; [Imai, Yoshinori] Tohoku Univ, Grad Sch Sci, Dept Phys, Sendai, Miyagi 9808578, Japan; [Lorente, Nicolas; Choi, Deung-Jang] Donostia Int Phys Ctr, Donostia San Sebastian 20018, Spain; [Choi, Deung-Jang] Basque Fdn Sci, Ikerbasque, Bilbao 48013, Spain
- 등재 SCIE, SCOPUS
- 발행기관 AMER PHYSICAL SOC
- 발행년도 2021
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000182261
- 본문언어 영어
- Published As http://dx.doi.org/10.1103/PhysRevB.104.045406
초록/요약
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.
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