4/7/2024 0 Comments Flat earth 3d model download![]() ![]() Discussion of the paper by de Boer and Verwey. On the interaction of electrons in metals. Quantum phases driven by strong correlations. Colloquium: heavy-electron quantum criticality and single-particle spectroscopy. Giant spontaneous Hall effect in a nonmagnetic Weyl–Kondo semimetal. Weyl–Kondo semimetal in heavy-fermion systems. Kondo insulator to semimetal transformation tuned by spin–orbit coupling. Perfect Andreev reflection due to the Klein paradox in a topological superconducting state. Imaging emergent heavy Dirac fermions of a topological Kondo insulator. Observation of fractionally quantized anomalous Hall effect. Thermodynamic evidence of fractional Chern insulator in moiré MoTe 2. Signatures of fractional quantum anomalous Hall states in twisted MoTe 2. Symmetry-broken Chern insulators and Rashba-like Landau-level crossings in magic-angle bilayer graphene. Fractional Chern insulators in magic-angle twisted bilayer graphene. Topological flat bands in frustrated kagome lattice CoSn. In this Perspective article, we elucidate this connection, survey the new opportunities for cross-fertilization across platforms and assess the prospect for new insights that may be gained into correlation physics and its intersection with electronic topology.īradlyn, B. Inversely, the concept of electronic topology from lattice symmetry, which is fundamental in flat-band systems, is enriching the field of strongly correlated electron systems, in which correlation-driven topological phases are increasingly being investigated. Indeed, it has recently been suggested that flat-band physics can be understood in terms of Kondo physics. A rapidly increasing body of strikingly similar phenomena across the different platforms - from electronic localization–delocalization transitions to strange-metal behaviour and unconventional superconductivity - suggests that similar underlying principles could be at play. The question then arises as to what commonality in the physical properties and microscopic physics, if any, exists between these two broad categories of materials. In addition to itinerant electrons from large, strongly overlapping orbitals, they frequently contain electrons from more localized orbitals, which are subject to a large Coulomb interaction. Seemingly unrelated to these materials is the large family of strongly correlated electron systems, which include the heavy-fermion compounds, and cuprate and pnictide superconductors. ![]() Their reduced bandwidth proportionally enhances the effect of Coulomb interaction, even when the absolute magnitude of the latter is relatively small. ![]() Flat bands can result from the electron motion on numerous (special) lattices and usually exhibit topological properties. Flat-band materials such as the kagome metals or moiré superlattices are of intense current interest. ![]()
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