Lara Ulčakar (Author), Gal Lemut (Author), Tomaž Rejec (Author), Jernej Mravlje (Author)

Abstract

We 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.

Keywords

fizika kondenzirane snovi;kvantna fizika;kvantni Hallov efekt;topološki fazni prehodi;Mottovi izolatorji;condensed matter physics;quantum physics;quantum Hall effect;topological phase transitions;Mott insulators;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FMF - Faculty of Mathematics and Physics
UDC: 538.9
COBISS: 236717827 Link will open in a new window
ISSN: 2469-9950
Views: 32
Downloads: 6
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Other data

Secondary language: Slovenian
Secondary keywords: fizika kondenzirane snovi;kvantna fizika;kvantni Hallov efekt;topološki fazni prehodi;Mottovi izolatorji;
Type (COBISS): Article
Pages: str. 195141-1-195141-11
Volume: ǂVol. ǂ111
Issue: ǂiss. ǂ19
Chronology: 2025
DOI: 10.1103/PhysRevB.111.195141
ID: 26417059