Progressive Control of Rashba State on Topological Dirac Semimetal KZnBi
Rashba states have been actively revisited as a platform for advanced applications such as spintronics and topological quantum computation. Yet, access to the Rashba state is restricted to the specific material sets, and the methodology to control the Rashba state is not established. Here, we report the Rashba states on the (001) surface of KZnBi, a 3D Dirac semimetal. Using angle-resolved photoemission spectroscopy and first-principles calculations, we investigated the evolution of Rashba states under different surface conditions controlled by alkali metal deposition. We observed that restoring surface ordering enables a Rashba state, which is absent in freshly cleaved surfaces. Interestingly, we were able to modify the dispersion of the Rashba state from an ordinary parabolic dispersion to a linearly dispersing Dirac-like state by additional alkali-metal deposition. Our findings provide a methodology for engineering the properties of Rashba states for advanced applications and redefine topological systems as generic hosts of Rashba states.
Authors
- Kimoon Han (ORCID: https://orcid.org/0000-0002-0489-4940)
- Jounghoon Hyun (ORCID: https://orcid.org/0000-0003-2254-4984)
- Yeonghoon Lee (ORCID: https://orcid.org/0000-0003-1040-7181)
- Sung Wng Kim (ORCID: https://orcid.org/0000-0002-4802-5421)
- Yeongkwan Kim (ORCID: https://orcid.org/0000-0003-1408-0550)
- Jahyun Koo (ORCID: https://orcid.org/0000-0003-0128-5303)
- Jonathan D. Denlinger (ORCID: https://orcid.org/0000-0001-7645-1631)
- Chan‐young Lim (ORCID: https://orcid.org/0000-0001-7354-6600)
- Jaehun Cha (ORCID: https://orcid.org/0000-0002-9072-0954)
- Gyubin Lee (ORCID: https://orcid.org/0000-0002-0128-6368)
- Sunghun Kim (ORCID: https://orcid.org/0000-0001-9320-7243)
Institutions
- Lawrence Berkeley National Laboratory (US)
- Korea Advanced Institute of Science and Technology (KR)
- Korea Research Institute of Standards and Science (KR)
- Advanced Light Source
- Donostia International Physics Center (ES)
- Ajou University (KR)
- Sungkyunkwan University (KR)
Publication Details
- Journal
- Nano Letters
- Published
- 2024-10-18
- DOI
- https://doi.org/10.1021/acs.nanolett.4c03802
- Citations
- 3
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 1.01
Funders
- Korea Research Institute of Standards and Science
- National Research Foundation of Korea