Distinguishing the gapped and Weyl semimetal scenario in Zr Te 5 : Insights from an effective two-band model

摘要: Here we study the static and dynamic transport properties of a low-energy two-band model proposed previously in Martino et al. [PRL 122, 217402 (2019)], with an anisotropic in-plane linear momentum dependence parabolic out-of-plane dispersion. The is extended to include negative band gap, which leads emergence Weyl semimetal (WSM) state, as opposed gapped (GSM) state when gap positive. We calculate compare zero- finite-frequency GSM WSM cases. DC that are calculated for cases Drude spectral weight, mobility, resistivity. determine their on Fermi energy crystal direction. in- optical conductivities limit vanishing interband relaxation rate both semimetals. main common features ${\ensuremath{\omega}}^{1/2}$ ${\ensuremath{\omega}}^{3/2}$ frequency conductivity. seek particular related charge could unambiguously point one ground over other, based comparison experiment. Differences between principle possible only at extremely low carrier concentrations temperatures.