Phys. Rev. Lett. 100, 256801 (2008) [4 pages]Observation of Pinning Mode of Stripe Phases of 2D Systems in High Landau LevelsReceived 21 March 2008; published 23 June 2008 We study the radio-frequency diagonal conductivities of the anisotropic stripe phases of higher Landau levels near half-integer fillings. In the hard direction, in which larger dc resistivity occurs, the spectrum exhibits a striking resonance, while in the orthogonal, easy direction, no resonance is discernible. The resonance is interpreted as a pinning mode of the stripe phase. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.256801
DOI:
10.1103/PhysRevLett.100.256801
PACS:
73.43.−f, 73.20.Qt, 73.21.−b
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