Chern-Textured Exciton Insulators with Valley Spiral Order in Moiré Materials
arXiv:2406.15342 · doi:10.1103/chsd-123t
Abstract
We explore the phase diagrams of moiré materials in search of a new class of intervalley-coherent correlated insulating state: the Chern texture insulator (CTI). This phase of matter, proposed in a companion paper, breaks valley symmetry in a nontrivial fashion wherein the valley order parameter is forced to texture in momentum space as a consequence of band topology. Using detailed Hartree-Fock studies, we establish that the CTI emerges as an energetically competitive intermediate-coupling ground state in several moiré systems which lack a twofold rotation symmetry that forbids the single-particle topology essential to the formation of the CTI valley texture.
arXiv comment12 + 2 pages
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