Browsing by Author "Malavé, Gabriel"

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    Axionic quantum criticality of generalized Weyl semimetals
    (2025) Malavé, Gabriel; Soto Garrido, Rodrigo; Pontificia Universidad Católica de Chile. Facultad de Física
    In this work, we capture the quantum criticality of interacting generalized Weyl semimetals residing at the brink of axionic insulation. We do this by formulating a general field-theoretic description of $d$-dimensional interacting nodal semimetals featuring dispersion that scales with linear and $n$th power of momentum along $d_L$ and $d_M$ directions around a few isolated points in the reciprocal space. A suitable renormalization group scheme is controlled by ``small" parameters $\varepsilon=2-d_M$ and $1/N_f$, where $N_f$ is the number of identical fermion copies. The leading order renormalization group analysis suggests a Gaussian nature of the underlying quantum phase transition, around which the critical exponents assume mean-field values. This outcome agrees with previous results for simple Weyl semimetals ($d_L=3$ and $d_M=0$), and implies that marginal Fermi liquids showcase logarithmic corrections to physical observables at the scales of measurements.