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Many-body interaction effects in Dirac-Weyl semimetals

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Dirac materials have been at the forefront of condensed matter research over the past decade following breakthroughs in graphene transport experiments. The relativistic-like linear dispersion of quasiparticles near the Dirac point leads to a variety of intriguing phenomena, among which are many-body interaction effects that both resemble and strongly contrast with quantum electrodynamics. Most notably, graphene experiments have revealed a strong Dirac cone squeezing effect due to electron-electron interactions. This and related phenomena can arise not only in graphene, but also in three-dimensional Dirac-Weyl semimetals, albeit with many qualitative differences due to the renormalization of both charge and Fermi velocity in three dimensions. I will describe our efforts to develop a quantitative and predictive theory of many-body phenomena in both graphene and Dirac-Weyl semimetals.

This talk is part of the Theory of Condensed Matter series.

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