Figure 2
From: Quantum Oscillations at Integer and Fractional Landau Level Indices in Single-Crystalline ZrTe5
SdH oscillations in ZrTe5 and tilt magnetic field dependence.
(a) Optical image of the Hall bar device. The scale bar is 5 μm. (b) The longitudinal resistivity (red line) and the transverse Hall resistivity (blue line) as a function of magnetic (B) field at T = 0.3 K. B is along b-axis, perpendicular to the cleavage plane. Well-developed SdH oscillations are observed. (c) Δσxx as a function of 1/B for tilt angle θ = 0°. Several LLs are labeled by the arrows. LL N = 10 corresponds to B ~ 0.4 T. (d) LL index N versus 1/B. The closed squares represent the integer index Δσxx minima and the open squares denote the half integer index Δσxx maxima. The solid line shows the best liner fit. An intercept of 0.55 is obtained, indicative of a π Berry phase. (e) Schematic of the sample in tilt magnetic field. (f) Contour plot of Δρxx with respect to tilt angle θ and magnetic field B. Blue color highlights the evolution of LL N = 2. The dashed line represents the best fit by 
, indicating the 2D-like transport behavior of charged carriers.
