Research paperTheoreticalLandau-Level Mixing and SU(4) Symmetry Breaking in GrapheneNemin Wei, Guopeng Xu, Inti Sodemann Villadiego, Chunli HuangarXiv preprint·2024·10.48550/arxiv.2401.12528·arXiv:2401.12528AbstractRecent scanning tunneling microscopy experiments on graphene at charge neutrality under strong magnetic fields have uncovered a ground state characterized by Kekulé distortion (KD). In contrast, non-local spin and charge transport experiments in double-encapsulated graphene, which has a higher dielectric constant, have identified an antiferromagnetic (AF) ground state. We propose a mechanism to reconcile these conflicting observations, by showing that Landau-level mixing can drive a transition from AF to KD with the reduction of the dielectric screening. Our conclusion is drawn from studying the effect of Landau-level mixing on the lattice-scale, valley-dependent interactions to leading order in graphene’s fine structure constant kappa = e2/(hbar vF epsilon).Read more
Idealized monolayer graphene system in a strong magnetic field used for an analytical study of Landau-level mixing and SU(4) symmetry breaking.5 propertiesSimulatedCStudied MaterialExpand
Research paperTheoreticalLandau-Level Mixing and SU(4) Symmetry Breaking in GrapheneNemin Wei, Guopeng Xu, Inti Sodemann Villadiego, Chunli HuangarXiv preprint·2024·10.48550/arxiv.2401.12528·arXiv:2401.12528AbstractRecent scanning tunneling microscopy experiments on graphene at charge neutrality under strong magnetic fields have uncovered a ground state characterized by Kekulé distortion (KD). In contrast, non-local spin and charge transport experiments in double-encapsulated graphene, which has a higher dielectric constant, have identified an antiferromagnetic (AF) ground state. We propose a mechanism to reconcile these conflicting observations, by showing that Landau-level mixing can drive a transition from AF to KD with the reduction of the dielectric screening. Our conclusion is drawn from studying the effect of Landau-level mixing on the lattice-scale, valley-dependent interactions to leading order in graphene’s fine structure constant kappa = e2/(hbar vF epsilon).Read more
Idealized monolayer graphene system in a strong magnetic field used for an analytical study of Landau-level mixing and SU(4) symmetry breaking.5 propertiesSimulatedCStudied MaterialExpand
Research paperTheoreticalLandau-Level Mixing and SU(4) Symmetry Breaking in GrapheneNemin Wei, Guopeng Xu, Inti Sodemann Villadiego, Chunli HuangarXiv preprint·2024·10.48550/arxiv.2401.12528·arXiv:2401.12528AbstractRecent scanning tunneling microscopy experiments on graphene at charge neutrality under strong magnetic fields have uncovered a ground state characterized by Kekulé distortion (KD). In contrast, non-local spin and charge transport experiments in double-encapsulated graphene, which has a higher dielectric constant, have identified an antiferromagnetic (AF) ground state. We propose a mechanism to reconcile these conflicting observations, by showing that Landau-level mixing can drive a transition from AF to KD with the reduction of the dielectric screening. Our conclusion is drawn from studying the effect of Landau-level mixing on the lattice-scale, valley-dependent interactions to leading order in graphene’s fine structure constant kappa = e2/(hbar vF epsilon).Read more
Idealized monolayer graphene system in a strong magnetic field used for an analytical study of Landau-level mixing and SU(4) symmetry breaking.5 propertiesSimulatedCStudied MaterialExpand
Research paperTheoreticalLandau-Level Mixing and SU(4) Symmetry Breaking in GrapheneNemin Wei, Guopeng Xu, Inti Sodemann Villadiego, Chunli HuangarXiv preprint·2024·10.48550/arxiv.2401.12528·arXiv:2401.12528AbstractRecent scanning tunneling microscopy experiments on graphene at charge neutrality under strong magnetic fields have uncovered a ground state characterized by Kekulé distortion (KD). In contrast, non-local spin and charge transport experiments in double-encapsulated graphene, which has a higher dielectric constant, have identified an antiferromagnetic (AF) ground state. We propose a mechanism to reconcile these conflicting observations, by showing that Landau-level mixing can drive a transition from AF to KD with the reduction of the dielectric screening. Our conclusion is drawn from studying the effect of Landau-level mixing on the lattice-scale, valley-dependent interactions to leading order in graphene’s fine structure constant kappa = e2/(hbar vF epsilon).Read more
Idealized monolayer graphene system in a strong magnetic field used for an analytical study of Landau-level mixing and SU(4) symmetry breaking.5 propertiesSimulatedCStudied MaterialExpand
