Observation of spin splitting in the surface electronic structure of antiferromagnet NdBi

Abstract

Spin splitting in electronic band structures via antiferromagnetic orders is a new route to control spin-polarized carriers that is available for spintronics applications. Here, we investigated the spin degree of freedom in the electronic band structures of the antiferromagnet NdBi using laser-based spin- and angle-resolved photoemission spectroscopy (laser-SARPES). Our laser-SARPES experiments revealed that the two surface bands that appear in the antiferromagnetic state are spin-polarized in opposite directions as a counterpart of the spin splitting. Moreover, we observed that the spin polarization is antisymmetric to the electron momentum, indicating that spin degeneracy is lifted due the breaking of inversion symmetry at the surface. These results are well reproduced by our density functional theory calculations with the single-q magnetic structure, implying that the spin-split surface state is determined by the breaking of inversion symmetry in concert with the antiferromagnetic order.

References in corpus (35)

• WannierTools: An open-source software package for novel topological materials
• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
• New Perspectives for Rashba Spin-Orbit Coupling
• Wannier90 as a community code: new features and applications
• Electrical switching of an antiferromagnet
• Emergent Phenomena Induced by Spin-Orbit Coupling at Surfaces and Interfaces
• Efficient Electrical Spin-Splitter Based on Non-Relativistic Collinear Antiferromagnetism
• Electrical Manipulation of a Topological Antiferromagnetic State
• Spin-polarized current in non-collinear antiferromagnets
• Observation of Giant Band Splitting in Altermagnetic MnTe
• Multiple-stable anisotropic magnetoresistance memory in antiferromagnetic MnTe
• Observation of plaid-like spin splitting in a noncoplanar antiferromagnet
• Classification of atomic-scale multipoles under crystallographic point groups and application to linear response tensors
• Landau Theory of Altermagnetism
• Maximal Rashba-like spin splitting via kinetic energy-driven inversion symmetry breaking
• Chiral orbital-angular-momentum in the surface states of Bi2Se3
• Group-theoretical classification of multipole order: emergent responses and candidate materials
• Electrical switching in a magnetically intercalated transition metal dichalcogenide
• Néel Spin Currents in Antiferromagnets
• Widespread spin polarization effects in photoemission from topological insulators
• Multipole classification in 122 magnetic point groups for unified understanding of multiferroic responses and transport phenomena
• Emergence of Fermi arcs and novel magnetic splitting in an antiferromagnet
• Devil's staircase transition of the electronic structures in CeSb
• Strong Linear Dichroism in Spin-Polarized Photoemission from Spin-Orbit-Coupled Surface States
• Coherent control over three-dimensional spin polarization for the spin-orbit coupled surface state of Bi${}_2$Se${}_3$
• Symmetry-adapted modeling for molecules and crystals
• Rare-earth monopnoctides -- family of antiferromagnets hosting magnetic Fermi arcs
• Unusual change in the Dirac-cone energy band upon two-step magnetic transition in CeBi
• Laser-based angle-resolved photoemission spectroscopy with micrometer spatial resolution and detection of three-dimensional spin vector
• Directional effects of antiferromagnetic ordering on the electronic structure in NdSb
• Antiferromagnetic topological insulator with selectively gapped Dirac cones
• Unusual surface states associated with the PT-symmetry breaking and antiferromagnetic band folding in NdSb
• Origin of the exotic electronic states in antiferromagnetic NdSb
• Unconventional Surface State Pairs in a High-Symmetry Lattice with Anti-ferromagnetic Band-folding