Read e-book online Advances in Imaging and Electron Physics, Vol. 107 PDF

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By Peter W. Hawkes (Ed.)

ISBN-10: 0120147491

ISBN-13: 9780120147496

Advances in Imaging & Electron Physics merges long-running serials--Advances in Electronics & Electron Physics and Advances in Optical & Electron Microscopy . The sequence positive aspects prolonged articles at the physics of electron units (especially semiconductor devices), particle optics at low and high energies, microlithography, photo technological know-how and electronic snapshot processing, electromagnetic wave propagation, electron microscopy, and the computing equipment utilized in a majority of these domain names.

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1998b). These oscillations, too, are found to be a generic feature of these devices, and suggest that the selective nature to electron transport inferred previously is indeed an intrinsic property of these devices. As for the origin of the gate-voltage induced oscillations, these are thought to arise from an associated modulation of the size of the dot. , 1994b) indicates that the magnitude of this modulation may be as much as several tens of percent, at least in the smallest dots studied. 6 GATE VOLTAGE (VOLTS) FIGURE13.

Time shortens at higher temperatures, the number of electrons that are able to propagate coherently along these orbits should decrease exponentially. As the fluctuations are thought to result from interference between electrons that propagate coherently along the stable orbits, it thus seems reasonable that this exponential reduction in transmission probability should be reflected directly in the amplitude of the fluctuations. , 1992). 5 TEMPERATURE (KELVIN) FIGURE22. Left: The root mean square (rms) amplitude of the conductance fluctuations decreases exponentially with increasing temperature in experiment.

65 1 - c. w 1 0 - - 0 2 0 4 0 6 0 8 0 1 0 0 FREQUENCY (lTTESI-4) FIGURE 8. The well-defined periodicity observed in the weak field magneto-conductance fluctuations is found to be correlated to the recurrence of well-defined wavefunction scars within the dot. 4-pm split-gate dot, which reveals fluctuations with a fundamental frequency of 9 T-'. This frequency content does not change significantly as the dot lead openings are varied, and corresponds closely to the field scale over which a diamond scar recurs.

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Advances in Imaging and Electron Physics, Vol. 107 by Peter W. Hawkes (Ed.)

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