2021/03/31 by Akira Endo, Shingo Katsumoto, Yasuhiro Iye · 1 citation
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.103.235303
published as Phys. Rev. B 103, 235303 (2021) · 9 pages, 5 figures, minor revision
arxiv created 2021/06/07 · arxiv updated 2021/06/08
We have observed commensurability oscillations (CO) in the Hall resistance Ryx of a unidirectional lateral superlattice (ULSL). The CO, having small amplitudes (∼ 1 Ω) and being superposed on a roughly three-orders of magnitude larger background, are obtained by directly detecting the difference in Ryx between the ULSL area and the adjacent unmodulated two-dimensional electron gas area, and then extracting the odd part with respect to the magnetic field. The CO thus obtained are compared with a theoretical calculation and turn out to have the amplitude much smaller than the theoretical prediction. The implication of the smaller-than-predicted CO in Ryx on the thermoelectric power of ULSL is briefly discussed.