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Quantum conductance fluctuations in semiconductor devices
B.C. Scannell,T.P. Martin,M.S. Fairbanks,H. Linke,C.A. Marlow,T.M. Fromhold,C.V. Brown,K. Ishibashi,R.P. Taylor 한국물리학회 2008 Current Applied Physics Vol.8 No.3,4
Magneto-conductance uctuations serve as the traditional method for investigating the dynamics of electrons as they ow throughsolid-state materials. Generated by electron wave interference, their spectral content is critically sensitive to the precise scattering con-gurations in the material. In this paper, we exploit this sensitivity to study the electron dynamics in the diusive regime of semiconduc-tors where the dynamics are determined by material-induced scattering. We show that the spectral content of the uctuations measuredon diusive n+GaAs wires and quasi-ballistic AlGaAs/GaAs wires follow a fractal scaling behaviour similar to that previously observed.