Landau-level coincidences are examined in a (100) silicon 2DEG by tuning the valley-splitting with front- and back-gates. A coincidence under quantum Hall conditions between levels of opposite spin, opposite valley, but like orbital indices at ν = 6 is found to show suppressed resistance, while in marked contrast, coincidences at ν = 4i (where i is an integer) between adjacent orbital Landau levels exhibit resistance spikes.
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Condensed Matter Physics