Nodal-line semimetal states in the positive-electrode material of a lead-acid battery: Lead dioxide family and its derivatives
Nodal-line semimetal states in the positive-electrode material of a lead-acid battery: Lead dioxide family and its derivatives
Based on first-principles calculations and symmetry analysis, we report that the three-dimensional nodal-line (NL) semimetal phases can be realized in the lead dioxide family ( $\ensuremath{\alpha}$ -${\mathrm{PbO}}_{2}$ and $\ensuremath{\beta}$ -${\mathrm{PbO}}_{2}$) and its derivatives. The $\ensuremath{\beta}$ -${\mathrm{PbO}}_{2}$ features two orthogonal nodal rings around the Fermi level, protected by the mirror reflection …