Chern insulator phases and spontaneous spin and valley order in a moiré lattice model for magic-angle twisted bilayer graphene
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review B"
DOI: 10.1103/physrevb.107.165114
Abstract: At a certain"magic"relative twist angle of two graphene sheets it remains a challenge to obtain a detailed description of the proliferation of correlated topological electronic phases and their filling-dependence. We perform a self-consistent real-space Hartree-Fock… read more here.
Keywords: valley; spontaneous spin; lattice model; spin valley ... See more keywords
Moiré Lattice in One-Dimensional Synthetic Frequency Dimension.
Sign Up to like & getrecommendations! Published in 2023 at "Physical review letters"
DOI: 10.1103/physrevlett.130.143801
Abstract: The moiré lattice has recently attracted broad interest in both solid-state physics and photonics where exotic phenomena in manipulating the quantum states are explored. In this work, we study the one-dimensional (1D) analogs of "moiré"… read more here.
Keywords: frequency dimension; frequency; synthetic frequency; moir lattice ... See more keywords
Photonic Moiré lattice waveguide with a large slow light bandwidth and delay-bandwidth product.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.462016
Abstract: We proposed an effective approach to enlarge the slow light bandwidth and normalized-delay-bandwidth product in an optimized moiré lattice-based photonic crystal waveguide that exhibits intrinsic mid-band characteristics. A flatband corresponding to a nearly constant group… read more here.
Keywords: bandwidth product; delay bandwidth; bandwidth; slow light ... See more keywords
Inverse design of a photonic moiré lattice waveguide towards improved slow light performances.
Sign Up to like & getrecommendations! Published in 2023 at "Applied optics"
DOI: 10.1364/ao.485059
Abstract: Slow light waveguides in photonic crystals are engineered using a conventional method or a deep learning (DL) method, which is data-intensive and suffers from data inconsistency, and both methods result in overlong computation time with… read more here.
Keywords: band; lattice waveguide; photonic moir; slow light ... See more keywords