Figure 5
From: Observation of quasi-two-dimensional Dirac fermions in ZrTe5
Dispersion characteristics along orthogonal axes. (a) The temperature dependence of the Shubnikov–de Haas (SdH) oscillation amplitude for the magnetic field parallel to the c-axis (upper), the a-axis (middle) and the b-axis (lower). (b) The effective mass and Fermi velocity retracted from the SdH oscillations in different crystal planes. (c) The effective mass and Fermi velocity calculated from (b) based on the ellipsoid model. (d) A schematic drawing for dispersion characteristics along different orientations. Dirac dispersion is found along the a- and c-axes and nonlinear dispersion along the b-axis. The detail kb dispersion needs to be investigated using high-resolution angle-resolved photoemission spectroscopy (ARPES) spectroscopy.
