Energy dispersive backscattering of electrons from surface resonances of a disordered medium and 1/f noise |
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Authors: | A M Jayannavar G V Vijayagovindan N Kumar |
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Institution: | (1) Department of Physics, Indian Institute of Science, 560012 Bangalore, India |
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Abstract: | Anderson localised states in the bulk of a disordered medium appear as sharp resonances near the surface. The resonant backscattering leads to an energy-dependent random time delay for an incident electron. We derive an analytic expression for the delay-time probability distribution at a given energy. This is shown to give a 1/f noise for the surface currents in general. |
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