Flat chern band
WebAug 7, 2024 · Flat Chern Band From Twisted Bilayer MnBi Te Biao Lian, Zhaochen Liu, Yuanbo Zhang, Jing Wang We construct a continuum model for the Moiré superlattice of twisted bilayer MnBi Te, and study the band structure of the bilayer in both ferromagnetic (FM) and antiferromagnetic (AFM) phases. WebMar 8, 2013 · Here, we present a first-principles design of a two-dimensional indium-phenylene organometallic framework that realizes a nearly flat Chern band right around the Fermi level by combining lattice geometry, spin-orbit coupling, and ferromagnetism. An effective four-band model is constructed to reproduce the first-principles results.
Flat chern band
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WebMay 10, 2012 · Flat-band localization, as an important phenomenon in solid-state physics, is fundamentally interesting in the exploration of exotic ground-state properties of many … Web2 days ago · An unusual topological quantum phase transition induced by the on-site Coulomb interaction brings a nearly flat band with a nonzero Chern number as the highest occupied band. With this analysis we ...
WebFeb 12, 2024 · We introduce a scheme by which flat bands with higher Chern number can be designed in ultracold gases through a coherent manipulation of Bloch bands. Inspired by quantum-optics methods, our approach consists in creating a "dark Bloch band" by coupling a set of source bands through resonant processes. WebMar 27, 2024 · We find the system exhibits highly tunable Chern bands with Chern number up to 3. We show that a twist angle of 1° turns the highest valence band into a flat band …
WebJan 3, 2024 · Here, we report the experimental observation of ferromagnetism at noninteger filling (NIF) of a flat Chern band in a ABC-TLG/hBN moiré superlattice. This state exhibits prominent ferromagnetic hysteresis behavior with large anomalous Hall resistivity in a broad region of densities centered in the valence miniband at n = −2.3 n0. WebJan 15, 2024 · The valley Chern numbers of the two nearly flat bands in the twisted TLG depends on the twist angle θ and the perpendicular electric field E ⊥. Considering its topological flat bands, the twisted TLG should be an ideal experimental platform to study the strongly correlated physics in topologically nontrivial flat band systems.
WebThe Zeeman-type moiré potentials generically gap out the moiré surface Dirac cones and give rise to isolated flat Chern minibands with Chern number ±1 . Interestingly, the bandwidth of such isolated flat minibands is insensitive to the twisting angle, which originates from the completely flat band of the p orbitals on the honeycomb lattice.
WebFeb 24, 2024 · A flat Chern band is found at a “magic” value of magnetization m ¯ ∼ 0.2 for Schrödinger electrons, and it generally occurs for Dirac electrons. The magnetic … hanks greyhound brothers sequelsWebMar 18, 2024 · @article{osti_1811500, title = {Orbital Chern Insulator and Quantum Phase Diagram of a Kagome Electron System with Half-Filled Flat Bands}, author = {Ren, Yafei and Jiang, Hong-Chen and Qiao, Zhenhua and Sheng, D. N.}, abstractNote = {In this work, we study the quantum phase diagram of electrons on kagome lattice with half-filled … hanks greyhound brothersWebJan 18, 2024 · ABSTRACT Systems with a flat Chern band have been extensively studied for their potential to realize high-temperature fractional quantum Hall states. To … hanks grocery bremertonWebLoose Chain performs music for all generations, including yesterday's favorites and today's top hits, guaranteeing a packed dance floor all night long. The band's electrifying stage … hanks grill and cateringWebJun 1, 2024 · Flat Chern bands of twisted multilayer graphene systems. In this part, we investigate the topological properties and tunability of the flat Chern bands of ATMG … hanks greyhound movieWebAug 1, 2024 · @Tengen In general, the flat band is not associated with non-trivial Chern number. For example, the Kagome flat band has no Chern number, and in fact the Chern number is not even well-defined due to the gapless character at the band touching point. For the gapped flat bands, many of them do have non-trivial Chern numbers, but I do … hanks groceryWebMay 17, 2024 · Systems with a flat Chern band have been extensively studied for their potential to realize high-temperature fractional quantum Hall states. To experimentally observe the quantum transport properties, a sizable topological gap is highly necessary. Taking advantage of the high tunability of two-dimensional ... hanks grocery bremerton phone number