Title:
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Impedance field and transition from thermal to shot noise in Cd1-xZnxTe semi-insulating Ohmic detectors
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Author:
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Rosini, M.; Reggiani, L. (Lino), 1941-; Gomila Lluch, Gabriel
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Other authors:
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Universitat de Barcelona |
Abstract:
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Within a drift-diffusion model we investigate the role of the self-consistent electric field in determining the impedance field of a macroscopic Ohmic (linear) resistor made by a compensated semi-insulating semiconductor at arbitrary values of the applied voltage. The presence of long-range Coulomb correlations is found to be responsible for a reshaping of the spatial profile of the impedance field. This reshaping gives a null contribution to the macroscopic impedance but modifies essentially the transition from thermal to shot noise of a macroscopic linear resistor. Theoretical calculations explain a set of noise experiments carried out in semi-insulating CdZnTe detectors. |
Subject(s):
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-Física de l'estat sòlid -Electrònica quàntica -Electronic transport in condensed matter -Electronic structure and electrical properties of surfaces -Quantum electronics |
Rights:
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(c) The American Physical Society, 2007
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Document type:
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Article Article - Published version |
Published by:
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The American Physical Society
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