Physical Review B
Approaching three-dimensional quantum Hall effect in bulk HfTe₅
Physical Review B · 101, 161201 (2020)
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Introduction
Bulk HfTe₅ develops Hall plateaus accompanied by small but finite longitudinal resistance. Oscillations provide an independent estimate of the Fermi wavelength, which scales with the plateau values.
A closer reading
The word ‘approaching’ matters. Hall plateaus and vanishing longitudinal resistance are distinct tests; the residual longitudinal channel motivates the authors’ comparison with an additional Fermi pocket.