Figure 5
From: Fermi surface topology and signature of surface Dirac nodes in LaBi
Paramagnetic singularity in magnetization measurement for LaBi. (a) Schematic representing the helical spin-texture of surface Dirac cones for a 3D topological insulator without and with magnetic field. The arrows indicate the direction of the electron spins. (b) Low field region of the magnetic moment vs. B curves at different temperatures for LaBi. (c) Magnetic susceptibility χ (=dM/dB), calculated by taking first order derivative of magnetic moment, plotted as a function of magnetic field. Inset shows the linear field decay of χ. (d) Magnetic susceptibility of standard Bi and Pd samples.
