Fig. 3: Magnetotransport of FIB-cut grooves.
From: Transport evidence for chiral surface states from three-dimensional Landau bands
a, Magnetic-field-dependent electrical resistance R(B) of the N-groove state with B ∥ bisectrix and I ∥ binary at T = 2 K. The inset shows R(B) in high magnetic fields (B > 10 T). b, Conductance of grooves Ggrooves as a function of N with a magnetic field of 10 T at 2 K. The parallel-conductor model is used in estimating Ggrooves (Methods). c, Angle-dependent electrical resistance R(θ) of the N-groove state, where the magnetic field B (0.2 T, 14 T) is rotating in the plane perpendicular to the current direction (I ∥ trigonal) at T = 2 K. d, Schematic of the chiral boundary states in the microstructured bismuth with different field angles. When the system is in the quantum limit, chiral boundary states (highlighted with the orange area) along sidewalls parallel to the magnetic field dominate the surface conduction. Cutting grooves effectively increases the surface area of the chiral boundary states under the out-of-plane magnetic field (θ = 0°) but make negligible change with the in-plane magnetic fields (θ = 90°).
