Effect of disorder on density of states and conductivity in higher-order Van Hove singularities in two-dimensional bands
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DOI: 10.1103/physrevb.105.075144
Abstract: We study systems with energy bands in two dimensions, hosting higher order Van Hove singularities (HOVHS) in the presence of disorder, using standard diagrammatic techniques for impurity averaging. In the clean limit, such singularities cause… read more here.
Keywords: order; higher order; van hove; order van ... See more keywords
Enhanced nematicity emerging from higher-order Van Hove singularities
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DOI: 10.1103/physrevb.107.184504
Abstract: Motivated by the experimental identification of a higher-order van Hove singularity (VHS) in AV$_3$Sb$_5$ kagome metals, we study electronic instabilities of 2D lattice models with higher-order VHS and flavor degeneracy. In contrast to conventional VHSs,… read more here.
Keywords: order van; nematicity emerging; higher order; order ... See more keywords