Fig. 3: Weyl bands formation in B2u-11 mode.
From: Robust and tunable Weyl phases by coherent infrared phonons in ZrTe5
a–c Band structure and orbital content of the bands forming the WPs along the kz direction for: a Q = 1, b Q = 4, and c Q = 1.5 but starting from a DSM phase which was obtained by the application of the Ag-27 phonon mode18. The insets in (b), (c) show zoomed band plots within a narrow energy window of the Weyl bands. d Evolution of the WPs as a function of Q when starting from a DSM phase. e Variation of the inversion symmetry breaking term c and the mass m as a function of Q obtained by fitting the DFT bands to the eigenvalues from the effective Hamiltonian for B2u-11 mode starting from the STI phase (i.e., the ground state) and DSM phase. The dashed lines are fits using Eq. (6). f Momentum transfer between the Weyl points as a function of Q for pumping a STI (blue dots) and a DSM (red dots). g Schematics of a double-pumping all-light-controlled experiment that utilizes low-power laser sources to drive ZrTe5 into a Weyl state.
