Figure 2 | Scientific Reports

Figure 2

From: Two-dimensional universal conductance fluctuations and the electron-phonon interaction of surface states in Bi2Te2Se microflakes

Figure 2

The 2D UCFs demonstrated by the field-tilting measurement.

(a) The schematic diagram showing the 2D UCF solely depends on the perpendicular component of the magnetic field (B⊥). (b) The B-tilting δG-B data of a Bi2Te2Se microflake measured at 2 K. The black, red and blue circle-marked lines respectively show the similar features, namely p1, p2 and p3, in all the δG-B curves. For clarity, adjacent curves are displaced vertically. (c) The positions of the UCF features plotted against θ. The black, red and blue data are from those of p1, p2 and p3 in (b), respectively. The solid curves are the 1/cosθ fitting. (d) θ dependent δGrms. The dashed curve is for eye guiding. The UCF measured at θ = 90° is interpreted as the contribution from the bulk carriers in TIs.

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