Fourier analyses of commensurability oscillations in Fibonacci lateral superlattices - Condensed Matter > Mesoscale and Nanoscale PhysicsReportar como inadecuado




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Abstract: Magnetotransport measurements have been performed on Fibonacci lateralsuperlattices FLSLs - two-dimensional electron gases subjected to a weakpotential modulation arranged in the Fibonacci sequence, LSLLSLS

., withL-S=tau the golden ratio. Complicated commensurability oscillation CO isobserved, which can be accounted for as a superposition of a series of COs eacharising from a sinusoidal modulation representing the characteristic lengthscale of one of the self-similar generations in the Fibonacci sequence.Individual CO components can be separated out from the magnetoresistance traceby performing a numerical Fourier band-pass filter. From the analysis of theamplitude of a single-component CO thus extracted, the magnitude of thecorresponding Fourier component in the potential modulation can be evaluated.By examining all the Fourier contents observed in the magnetoresistance trace,the profile of the modulated potential seen by the electrons can bereconstructed with some remaining ambiguity about the interrelation of thephase between different components.



Autor: Akira Endo, Yasuhiro Iye

Fuente: https://arxiv.org/







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