Model Hamiltonian for Altermagnetic Topological Insulators
arXiv:2507.23173 · doi:10.1103/s57q-q7gt
Abstract
We present models of topological insulating Hamiltonians exhibiting intrinsic altermagnetic features, protected by combined three-fold or four-fold rotational symmetries with time-reversal. We demonstrate that the spin Chern number serves as a robust topological invariant in two-dimensional systems, while for three-dimensional structures, the topological nature is characterized by the spin Chern numbers computed on the = and = planes. The resulting phases support symmetry-protected boundary modes, including corner, hinges and surface states, whose structure is determined by the magnetic symmetry and the local magnetic moments. Our findings bridge the fields of altermagnetism and topological quantum matter, and establish a theoretical framework for engineering spintronic topological systems without net magnetization.
11 pages, 6 figures
References in corpus (51)
- Topological Insulators
- Topological insulators and superconductors
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- Topological Order and the Quantum Spin Hall Effect
- Topological Insulators in Three Dimensions
- Classification of topological quantum matter with symmetries
- WannierTools: An open-source software package for novel topological materials
- Higher-Order Topological Insulators
- Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
- Crystal Hall effect in Collinear Antiferromagnets
- Time Reversal Polarization and a Z_2 Adiabatic Spin Pump
- Interface-induced superconductivity and strain-dependent spin density wave in FeSe/SrTiO3 thin films
- Quantum Spin Hall Effect and Topologically Invariant Chern Numbers
- Electronic Origin of High Temperature Superconductivity in Single-Layer FeSe Superconductor
- Broken Kramers' degeneracy in altermagnetic MnTe
- Altermagnetism: Exploring New Frontiers in Magnetism and Spintronics
- Direct observation of altermagnetic band splitting in CrSb thin films
- Spontaneous anomalous Hall effect arising from an unconventional compensated magnetic phase in a semiconductor
- Prediction of unconventional magnetism in doped FeSb2
- Robustness of the Spin-Chern number
- Discovery of a metallic room-temperature d-wave altermagnet KV2Se2O
- Topological Superconductivity in Two-Dimensional Altermagnetic Metals
- Calculation of intrinsic spin Hall conductivity by Wannier interpolation
- Enumeration and representation theory of spin space groups
- Altermagnetic Routes to Majorana Modes in Zero Net Magnetization
- Spin Space Groups: Full Classification and Applications
- Topological transition from nodal to nodeless Zeeman splitting in altermagnets
- Mirror Chern Bands and Weyl Nodal Loops in Altermagnets
- Observation of Spin Splitting in Room-Temperature Metallic Antiferromagnet CrSb
- Anisotropy of the anomalous Hall effect in the altermagnet candidate MnSi films
- Atomic and electronic structures of FeSe monolayer and bilayer thin films on SrTiO (001): a first-principles study
- Creation and Manipulation of Higher-Order Topological States by Altermagnets
- Spin-Resolved Topology and Partial Axion Angles in Three-Dimensional Insulators
- Observation of surface Fermi arcs in altermagnetic Weyl semimetal CrSb
- Observation of the anomalous Nernst effect in altermagnetic candidate Mn5Si3
- Electronic structure of FeSe monolayer superconductors
- Altermagnetic phase transition in a Lieb metal
- Superconductivity in monolayer FeSe enhanced by quantum geometry
- Altermagnetic variants in thin films of Mn5Si3
- Topological responses from gapped Weyl points in 2D altermagnets
- Spin Chern number in altermagnets
- Altermagnetism-Induced Parity Anomaly in Weak Topological Insulators
- Quasi-one-dimensional spin transport in altermagnetic nodal net metals
- Interplay of Altermagnetic Order and Wilson Mass in the Dirac Equation: Helical Edge States without Time-Reversal Symmetry
- Altermagnetic Instabilities from Quantum Geometry
- Projected spin texture as a bulk indicator of fragile topology
- Floating Edge Bands in the Bernevig-Hughes-Zhang model with Altermagnetism
- Altermagnetism Induced Topological Phase Transitions in Kane-Mele Model
- Pfaffian invariant identifies magnetic obstructed atomic insulators
- Spin Weyl Topological Insulators
- C*-framework for higher-order bulk-boundary correspondences