A Giant Bulk‐Type Dresselhaus Splitting with 3D Chiral Spin Texture in IrBiSe

Abstract

Non-magnetic half-metals are a new class of materials that are metallic only for one spin direction. In contrast to conventional half-metals, this spin direction is not fixed in space and is always perpendicular to the momentum of an electron. IrBiSe is one of such materials. Using angle-resolved photoemission spectroscopy and band structure calculations, Zhonghao Liu et al. find a record-high Dresselhaus spin-orbit splitting, fully spin-polarized remnant Fermi surfaces and a chiral 3D spin-texture, all with no magnetism present (see article number 1900684). Promising applications include using IrBiSe as a source of spin-polarized electrons, and lightly doped IrBiSe is expected to generate electric-field-controlled spin-polarized currents, free from back scattering, and could host triplet superconductivity.