Quantised transverse conductance σ_xy = ν e²/h in a 2D electron gas under strong B, at integer (IQHE) or fractional (FQHE) filling factors ν. First topological phase observed.
Quantised transverse conductance σ_xy = ν e²/h in a 2D electron gas under strong B, at integer (IQHE) or fractional (FQHE) filling factors ν. First topological phase observed.