A Giant Bulk‐Type Dresselhaus Splitting with 3D Chiral Spin Texture in IrBiSe
Abstract
Materials with giant spin splitting are desired for spintronic applications. The fabrications of spintronic devices from half metals with one spin direction are often hampered, however, by stray magnetic fields, domain walls, short spin coherence times, scattering on magnetic atoms or magnetically active interfaces, and other characteristics that come along with the magnetism. The surfaces of topological insulators, or Dirac/Weyl semimetals, could be an alternative, but production of high‐quality thin films without the presence of the bulk states at the Fermi energy remains very challenging. Here, by utilizing angle‐resolved photoemission spectroscopy, a record‐high Dresselhaus spin–orbit splitting of the bulk state in the nonmagnetic IrBiSe is found. The band structure calculations indicate that the splitting band is fully spin‐polarized with 3D chiral spin texture. As a source of spin‐polarized electrons, lightly doped IrBiSe is expected to generate electric‐field‐controlled spin‐polarized currents, free from back scattering, and could host triplet and Fulde–Ferrel–Larkin–Ovchinnikov (FFLO) superconductivity.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 12, 2020
- Source ID
- 10.1002/pssr.201900684
Entities
People
- Alexander N. Yaresko
- Dawei Shen
- Quinn Gibson
- Robert Cava
- Satya Kushwaha
- Sergey V. Borisenko
- Setti Thirupathaiah
- Wei Xia
- Yanfeng Guo
- Zhonghao Liu
Organizations
- Army Research Office
- Chinese Academy of Sciences
- Indian Institute of Science, Bengaluru
- Leibniz Institute for Solid State and Materials Research
- Max Planck Society
- National Natural Science Foundation of China
- National Science Foundation
- Princeton University
- ShanghaiTech University