Quantum anomalous Hall domains in a quenched topological Mott insulatorUlčakar, Lara (Avtor) Lemut, Gal (Avtor) Rejec, Tomaž (Avtor) Mravlje, Jernej (Avtor) condensed matter physicsquantum physicsquantum Hall effecttopological phase transitionsMott insulatorsWe study an interacting spinless quadratic band touching model that realizes a topological Mott insulating state. We quench the interaction from a value corresponding to the nematic insulator to that of the quantum anomalous Hall (QAH) ordered phase. We perform time-dependent Hartree-Fock simulations and show that after the quench the system realizes an excited Dirac semimetal state, which is, however, unstable and spontaneously evolves to a state with inhomogeneous nematic and QAH order parameters. The modulations form a stripe pattern that grows exponentially with time until the local Chern marker reaches unity. The alternating QAH order defines a domain structure with boundaries that host chiral sublattice currents.20252025-05-21 16:15:52Članek v reviji169273UDK: 538.9ISSN pri članku: 2469-9950DOI: 10.1103/PhysRevB.111.195141COBISS_ID: 236717827sl