2. Magnetically induced band structure(a) Skew minibands. The band structure in the experiment of Kouwenhoven et al.250 is present only in the quantum Hall effect regime and can thus be said to be magnetically induced. The magnetic field breaks timereversal symmetry. Let us see what consequences that has for the band structure. The hamiltonian in the Landau gauge A = (0,Bx, 0) is