WebMar 4, 2024 · The experimentally observed C = 2 Chern band can be understood theoretically by incorporating electron–electron interaction effects on the quasi-particle band structure of ABC-TLG/hBN moiré... WebMar 2, 2024 · More information: Nisarga Paul et al, Giant proximity exchange and flat Chern band in 2D magnet-semiconductor heterostructures, Science Advances (2024). DOI: 10.1126/sciadv.abn1401 Journal ...
Edge States and Topology in Floquet Systems - Stanford University
WebSep 30, 2024 · To date, all Chern insulator (ChI) phases have been reported to result from successively filling these C = ±1 bands. For example, hexagonal boron nitride (hBN) alignment breaks C2 symmetry and... WebApr 6, 2024 · In contrast to Landau levels, Chern bands have a finite dispersion whose competition with interactions may lead to interesting phase transitions between FCIs and symmetry-broken phases. Additionally, band gaps are not fixed by an external magnetic field but result from the microscopic details of the lattice, so a material could be designed … simplicity\\u0027s xd
Chern insulators, van Hove singularities and topological …
WebMay 28, 2024 · The reason being that (by Paley Weiner theorem) an exponentially localised Wannier basis implies the existence of a smooth gauge in k-space, and hence therefore that the Chern number is zero. Thus a band with non zero Chern number is a counter example to your reformulated claim, that a flat band admits a basis of localised states, but is not a ... WebFeb 15, 2024 · In the presence of the magnetic field, the two C = −1 ( C = +1) Chern bands, which are lowest (highest) in energy due to the orbital Zeeman effect, will be occupied … WebApr 21, 2024 · Electronic bands with non-zero Chern number is understood to give rise to topological phenomena. On the other hand, strong correlation between electrons heavily modifies band structure, resulting in topological property beyond single-particle theory. Moiré material consisting of two lattice-mismatched atomically thin transition metal … simplicity\u0027s xf