Signatures of a surface spin-orbital chiral metal

Abstract

The relation between crystal symmetries, electron correlations, and electronic structure steers the formation of a large array of unconventional phases of matter, including magneto-electric loop currents and chiral magnetism. Detection of such hidden orders is a major goal in condensed matter physics. However, to date, nonstandard forms of magnetism with chiral electronic ordering have been experimentally elusive. Here, we develop a theory for symmetry-broken chiral ground states and propose a methodology based on circularly polarized spin-selective angular-resolved photoelectron spectroscopy to probe them. We exploit the archetypal quantum material Sr2RuO4 and reveal spectroscopic signatures which, even though subtle, may be reconciled with the formation of spin-orbital chiral currents at the material surface. As we shed light on these chiral regimes, our findings pave the way for a deeper understanding of ordering phenomena and unconventional magnetism.

References in corpus (9)

• The Chiral Magnetic Effect
• Three-state nematicity and magneto-optical Kerr effect in the charge density waves in kagome superconductors
• Weyl, Dirac and high-fold chiral fermions in topological quantum materials
• Anomalous transport due to Weyl fermions in the chiral antiferromagnets Mn${}_3$$X$, $X$ = Sn, Ge
• Selective probing of hidden spin-polarized states in inversion-symmetric bulk MoS2
• Flat band separation and robust spin-Berry curvature in bilayer kagome metals
• Control of chiral orbital currents in a colossal magnetoresistance material
• Giant magnetochiral anisotropy from quantum confined surface states of topological insulator nanowires
• Unveiling unconventional magnetism at the surface of Sr${}_2$RuO${}_4$

Cited by in corpus (9)

• Orbitronics in Two-dimensional Materials
• On the engineering of higher-order Van Hove singularities in two dimensions
• Berry Curvature Signatures in Chiroptical Excitonic Transitions
• Bilayer orthogonal ferromagnetism in CrTe${}_2$-based van der Waals system
• Conditions for orbital selective altermagnetism in Sr${}_2$RuO${}_4$: tight binding model, similarities with cuprates and implications on superconductivity
• Uncovering the lowest thickness limit for room-temperature ferromagnetism of Cr${}_{1.6}$Te${}_2$
• Scattering makes a difference in circular dichroic angle-resolved photoemission
• Magnetic exchange interaction in spin-valve with chiral spin-triplet superconductor
• Orbital currents in lattice multiorbital systems: Continuity equation, torques, and RKKY interaction