Antichiral surface states and Su-Schrieffer-Heeger physics in rutile altermagnets
arXiv:2411.11949 · doi:10.1103/PhysRevB.111.L161109
Abstract
We study surface states and domain wall bound states in altermagnets using a rutile-lattice tight-binding model of electrons coupled to a Néel order. We discover that two symmetry-protected Weyl nodal lines in the bulk band structure can give rise to unconventional anti-chiral surface states -- surface states from opposite surfaces propagate in a \emph{parallel} manner, as opposed to the anti-parallel manner for the more conventional chiral surface states. We also find that the anti-chiral surface states can be turned into chiral surface states upon changing the surface termination. The origin of the surface states, the dependence on the surface termination, and key features of domain wall bound states are explained using a map from the altermagnet to a family of a modified Su-Schrieffer-Heeger(SSH) chain and the associated bulk-boundary correspondence. Our work reveals rutile altermagnets as a promising candidate among very few quantum materials that can support anti-chiral surface states.
arXiv commentThe updated version is published with open access in Physical Review B
References in corpus (31)
- Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
- Crystal Hall effect in Collinear Antiferromagnets
- Topological classification of crystalline insulators through band structure combinatorics
- Observation of the Anomalous Hall Effect in a Collinear Antiferromagnet
- The Zak phase and the existence of edge states in graphene
- Momentum-Dependent Spin Splitting by Collinear Antiferromagnetic Ordering
- Spin current generation in organic antiferromagnets
- Altermagnetism: Exploring New Frontiers in Magnetism and Spintronics
- Fragile Topology and Wannier Obstructions
- Prediction of unconventional magnetism in doped FeSb2
- Antiferromagnetism in RuO as -wave Pomeranchuk instability
- Bottom-up design of spin-split and reshaped electronic band structures in spin-orbit-coupling free antiferromagnets: Procedure on the basis of augmented multipoles
- Itinerant Antiferromagnetism in RuO
- Building Blocks of Topological Quantum Chemistry: Elementary Band Representations
- Wilson loop approach to fragile topology of split elementary band representations and topological crystalline insulators with time reversal symmetry
- Crystal Thermal Transport in Altermagnetic RuO2
- Anomalous Antiferromagnetism in Metallic RuO Determined by Resonant X-ray Scattering
- Landau Theory of Altermagnetism
- Antichiral edge states in a modified Haldane nanoribbon
- Bulk-boundary correspondence from the inter-cellular Zak phase
- Magnetic octupoles as the order parameter for unconventional antiferromagnetism
- Boundary-obstructed topological phases
- Topological transition from nodal to nodeless Zeeman splitting in altermagnets
- Quantum geometry induced nonlinear transport in altermagnets
- Minimal Models for Altermagnetism
- Mirror Chern Bands and Weyl Nodal Loops in Altermagnets
- Dynamic paramagnon-polarons in altermagnets
- Antichiral states in twisted graphene multilayers
- Copropagating edge states produced by the interaction between electrons and chiral phonons in two-dimensional materials
- Nonlinear Magnetoelectric Effect under Magnetic Octupole Order: Its Application to a -Wave Altermagnet and a Pyrochlore Lattice with All-In/All-Out Magnetic Order
- Signatures of hidden octupolar order from nonlinear Hall effects