Commensurability oscillations in wide parabolic well in the presence of an in-plane magnetic field

The commensurability oscillations in antidot lattices with different periods are studied in the tilted magnetic field in wide parabolic quantum well with five occupied subbands. We find that the commensurability peaks are continuously transformed to new magnetoresistance oscillations, when magnetic field is directed parallel to the well plane. The positions of the new peaks correspond to R-c/W-e approximate to 2.3 and 1, where R-c is the cyclotron radius, and W-e is the quantum well width. This result is consistent with recent quantum-mechanical calculations of the magnetoresistance in the presence of boundary-roughness scattering. (C) 2001 Elsevier Science B.V. All rights reserved.