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- W2072032511 abstract "Diffusion and localization in quantized quasi-2D systems with random rough surfaces is discussed. The emphasis is on mode coupling and on comparison of channels with different types of surface correlators. For small size roughness, the shapes of the dependence of the diffusion coefficient D on the channel width L are universal. For large scale roughness, the mode coupling is often suppressed and D(L) becomes very sensitive to the type of surface correlator. Experimentally, this is important for better quality channels and wave guides. The persistent sawtooth dependence D(L) at large correlation length of roughness R, R>L, is a distinct signature of the power-law decay of the Fourier image of the surface correlator while the suppression of the sawtooth behavior points at the exponential decay. Thickness fluctuations with an exponential power spectrum lead to a new type of quantum size effect in transport which is responsible for large-scale oscillations of D(L). In contrast to the usual sawtooth quantum size effect, these oscillations are not related to the quantization directly but resugt from the exponential opening of coupling for modes with small quantum numbers at certain values of L." @default.
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- W2072032511 date "2004-01-01" @default.
- W2072032511 modified "2023-09-26" @default.
- W2072032511 title "Mode Coupling in Quantized Quasi-2D Systems" @default.
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- W2072032511 doi "https://doi.org/10.1023/b:jolt.0000012611.62534.4e" @default.
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