Adatom engineering magnetic order in superconductors: Applications to altermagnetic superconductivity
arXiv:2411.02489 · doi:10.1103/PhysRevLett.134.146001
Abstract
We study theoretically how superlattices based on adatoms on surfaces of unconventional superconductors can be used to engineer novel pairing states that break time-reversal symmetry and exhibit non-trivial magnetic point symmetries. We illustrate this using a square-lattice Hubbard model with -wave superconductivity and a subleading -wave state as an example. An adatom superlattice with square-lattice symmetries is shown to stabilize an "orbital-altermagnetic superconductor'', a state that exhibits loop current patterns and associated orbital magnetic moments, which preserve superlattice translations but are odd under four-fold rotations. This state is further characterized by a non-zero Berry curvature quadrupole moment and, upon including spin-orbit coupling, by an altermagnetic spin splitting of the bands and non-trivial spin textures in the superlattice unit cell, with zero net spin moment.
10 pages, 6 figures
References in corpus (47)
- Broken Kramers' degeneracy in altermagnetic MnTe
- Tilted spin current generated by the collinear antiferromagnet RuO2
- Direct observation of altermagnetic band splitting in CrSb thin films
- Antiferromagnetism in RuO as -wave Pomeranchuk instability
- Crystal Thermal Transport in Altermagnetic RuO2
- dc Josephson Effect in Altermagnets
- Topological Superconductivity in Two-Dimensional Altermagnetic Metals
- Finite-momentum Cooper pairing in proximitized altermagnets
- Landau Theory of Altermagnetism
- Altermagnetic Routes to Majorana Modes in Zero Net Magnetization
- Absence of altermagnetic spin splitting character in rutile oxide RuO
- Magnetic octupoles as the order parameter for unconventional antiferromagnetism
- Two-dimensional altermagnets: Superconductivity in a minimal microscopic model
- Topological transition from nodal to nodeless Zeeman splitting in altermagnets
- Spin-split collinear antiferromagnets: a large-scale ab-initio study
- Theory of zero-field superconducting diode effect in twisted trilayer graphene
- Quantum geometry induced nonlinear transport in altermagnets
- Phase-shifted Andreev levels in an altermagnet Josephson junction
- Altermagnetic superconducting diode effect
- Minimal Models for Altermagnetism
- Majorana corner modes and tunable patterns in an altermagnet heterostructure
- Mirror Chern Bands and Weyl Nodal Loops in Altermagnets
- Spontaneous Formation of Altermagnetism from Orbital Ordering
- Altermagnetic anomalous Hall effect emerging from electronic correlations
- Realizing Altermagnetism in Fermi-Hubbard Models with Ultracold Atoms
- First-principle calculation of Chern number in gyrotropic photonic crystals
- Altermagnetism and magnetic groups with pseudoscalar electron spin
- Orientation-dependent Josephson effect in spin-singlet superconductor/altermagnet/spin-triplet superconductor junctions
- Superconductor-altermagnet memory functionality without stray fields
- Weak-Coupling Theory of Neutron Scattering as a Probe of Altermagnetism
- Generalized Aubry-André-Harper model with p-wave superconducting pairing
- Evidence for chiral superconductivity on a silicon surface
- p-band engineering in artificial electronic lattices
- Interplay between altermagnetism and nonsymmorphic symmetries generating large anomalous Hall conductivity by semi-Dirac points induced anticrossings
- Altermagnetism and superconductivity in a multiorbital t-J model
- Orbital-selective altermagnetism and correlation-enhanced spin-splitting in transition metal oxides
- Experimental evidence for Berry curvature multipoles in antiferromagnets
- Nodal band-off-diagonal superconductivity in twisted graphene superlattices
- Dynamic paramagnon-polarons in altermagnets
- Fluctuation induced piezomagnetism in local moment altermagnets
- Altermagnetism on the Shastry-Sutherland lattice
- Unconventional superconductivity in altermagnets with spin-orbit coupling
- Supercurrents and spontaneous time-reversal symmetry breaking by nonmagnetic disorder in unconventional superconductors
- Nonlinear Magnetoelectric Effect under Magnetic Octupole Order: Its Application to a -Wave Altermagnet and a Pyrochlore Lattice with All-In/All-Out Magnetic Order
- Altermagnetism in Heavy Fermion Systems: Mean-Field study on Kondo Lattice
- Nonlinear anomalous transverse responses induced by Berry curvature quadrupole in systems with broken time-reversal symmetry
- A Novel Perspective on Ideal Chern Bands with Strong Short-Range Repulsion: Applications to Correlated Metals, Superconductivity, and Topological Order