Journal
PHYSICAL REVIEW LETTERS
Volume 84, Issue 20, Pages 4681-4684Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.4681
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In this paper we report the measurement of conductance fluctuations in 3D crystals of Si made metallic by heavy doping. (L/L-phi similar to 10(3), where L-phi is the phase coherence length.) Temperature and magnetic field dependence of noise strongly indicate the universal conductance fluctuations as a predominant source of the observed magnitude of noise. Conductance fluctuations within a single phase coherent region of L-phi(3) were found to be saturated at [(delta G(phi))(2)] approximate to (e(2)/h)(2). An accurate knowledge of the level of disorder enables us to calculate the change in conductance delta G(1) due to movement of a single scatterer as [(delta G(1))(2)] similar to (e(2)/h)(2), which is similar to 2 orders of magnitude higher than its theoretically expected value in 3D systems.
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