Hall plateaus at magic angles in bismuth beyond the quantum limit

TL;DR

This study reveals the emergence of Hall plateaus at specific 'magic' angles in bismuth under high magnetic fields, showing field-independent Hall resistivity that disappears when tilted away from these angles, indicating angle-dependent quantum phenomena.

Contribution

It identifies and characterizes Hall plateaus at specific angles in bismuth beyond the quantum limit, highlighting the role of crystal orientation in quantum Hall effects.

Findings

Hall resistivity becomes field-independent at certain angles

Hall plateaus vanish when tilted off the magic angles

Two particular orientations influence the emergence of Hall plateaus

Abstract

We present a study of the angular dependence of the resistivity tensor up to 35 T in elemental bismuth complemented by torque magnetometry measurements in a similar configuration. For at least two particular field orientations a few degrees off the trigonal axis, the Hall resistivity was found to become field-independent within experimental resolution in a finite field window corresponding to a field which is roughly three times the frequency of quantum oscillations. The Hall plateaus rapidly vanish as the field is tilted off theses magic angles. We identify two distinct particularities of these specific orientations, which may play a role in the emergence of the Hall plateaus.