Chern insulating phases
http://yclept.ucdavis.edu/Publ/ChernMott_QMatss.pdf 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...
Chern insulating phases
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Webcally distinct insulating phases, marked by the values of a topological invariant, i.e. the Chern number C h. The topologically non-trivial insulating phase is characterized by C … WebStrongly correlated Chern insulators in magic-angle twisted bilayer graphene Interactions between electrons and the topology of their energy bands can create unusual quantum …
WebIn 3D momentum space, a topological phase boundary separating the Chern insulating layers from normal insulating layers may exist, where the gap must be closed, resulting in a "Chern semimetal" state with topologically unavoidable band crossings at the Fermi level. This state is a condensed-matter realization of Weyl fermions in ( 3 + 1 ) D ... WebApr 13, 2024 · Ideal Chern insulating phases arise in two-dimensional systems with broken time-reversal symmetry. They are characterized by having nearly flat bands, and a uniform quantum geometry---which combines the Berry curvature and quantum metric---and by being incompressible. In this work, we analyze the role of the quantum geometry in …
WebJun 15, 2024 · A transition from Chern insulator at small U to trivial Mott insulator at larger U occurred at a bandgap closing and reopening for the critical value Uc = 2.45 eV. Since calculated values of U for Fe are 4–5 eV, our conclusion was that the ground state is a conventional Mott insulator. Web2 days ago · Notably, at ν = ± 1 we find states with non-zero Chern numbers. For ν = −1 the insulating state exhibits a sharp hysteretic resistance enhancement when a perpendicular magnetic field greater ...
WebSetting the Fermi energy within the first bulk gap, E F = −1.5J, each region corresponds to a Chern insulating phase with Chern number ν tot = −1 and ν tot = +1, respectively. The result ...
WebWe report Chern insulating phases emerging from a single layer of layered chalcogenide CrSiTe3, a transition metal trichacogenides (TMTC) material, in the presence of charge doping. Due to strong hybridization with Te p orbitals, the spin-orbit coupling effect opens a finite band gap, leading to a nontrivial topology of the Cr eg conduction band manifold … blackstreet finallyWebJun 6, 2024 · Here, we develop an analogy between the mathematical description of waves propagating in such networks and models of Majorana fermions hopping on a lattice. Using this analogy we propose simple electrical network architectures that realize Chern insulating phases for electromagnetic waves. fowler\u0027s method anatomical dead spaceWebApr 13, 2024 · It is likely to be an insulating state; compared with its neighbouring phases, it has a much higher resistance that drops abruptly at a threshold in the applied current and shows nonlinear behaviour. blackstreet foxy brownblack street glasgowWebAug 5, 2024 · Sungmo Kang Seungjin Kang Heung-Sik Kim Jaejun Yu Abstract We report Chern insulating phases emerging from a single layer of layered chalcogenide CrSiTe$_ {3}$, a transition metal trichacogenides... black street fighter charactersWebMar 18, 2024 · We study the quantum phase diagram of electrons on kagome lattice with half-filled lowest flat bands by considering the antiferromagnetic Heisenberg interaction J, and short-range Coulomb interaction V.In the weak J regime, we identify a fully spin-polarized phase. The presence of finite V drives a spontaneous chiral current, which … fowler\u0027s model of spiritual developmentWebJan 25, 2024 · Moreover, this Chern insulating phase shows promising thermoelectric properties, e.g., a Seebeck coefficient between 400 and 800 μ VK − 1. A similar SOC-induced band inversion takes place also in the ferromagnetic semimetallic (Eu O) 2 / (Mg … fowler\u0027s modern english usage dictionary