Pinning mode resonances of 2D electron stripe phases: Effect of in-plane   magnetic field
  We study the anisotropic pinning-mode resonances in the rf conductivity spectra of the stripe phase of 2D electron systems (2DES) around Landau level filling 9/2, in the presence of an in-plane magnetic field, B_ip. The polarization along which the resonance is observed switches as B_ip is applied, consistent with the reorientation of the stripes. The resonance frequency, a measure of the pinning interaction between the 2DES and disorder, increases with B_ip. The magnitude of this increase indicates that disorder interaction is playing an important role in determining the stripe orientation. 
Han Zhu, G. Sambandamurthy, L. W. Engel, D. C. Tsui, L. N. Pfeiffer,   and K. W. West