Get Advances in Imaging and Electron Physics, Vol. 107 PDF

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 good points 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 picture processing, electromagnetic wave propagation, electron microscopy, and the computing equipment utilized in a lot of these domain names.

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Extra info for Advances in Imaging and Electron Physics, Vol. 107

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K. FERRY, AND M. STOPA I 0 I I I . I / , , , I , , . , I " " 50 I 100 FREQUENCY (V') FIGURE 16. The Fourier spectrum of the experimental conductance oscillations shown in Fig. 14, reveals a peak at the gate voltage frequency that corresponds to the recurring scars shown in Fig. 15 (see arrow). The inset shows the original, experimental oscillations. C. Zero-Field Magneto-Resistant Peak Another feature that may be observed in the magneto-resistance of open dots is a central peak at zero-field (Fig.

01 K. ) 14 J. P. BIRD, R. AKIS, D. K. FERRY, A N D M. STOPA maintaining phase coherence, and it is this highly recursive process that builds up the scar. Given such considerations, it is clear that a crucial requirement for the observation of well-defined scarring is that electrons remain coherently trapped within the dot over very long time scales. This notion is confirmed by the results of temperature dependent studies, which, as we will discuss in Section IV, may be considered as probing the time dependent evolution of the scars.

1994b). An example of this periodicity is shown in Fig. 36, in which the magnetic field position of successive oscillations is plotted. , 1994b, 1997d). Furthermore, small variations in period observed over larger ranges of magnetic field (Fig. , 1994b). The Aharonov-Bohm oscillations are rapidly quenched with increasing temperature and are typically no longer resolved by a degree Kelvin (Fig. 37). While we expect that both thermal averaging and phase breaking should be efficient in reducing the amplitude of the oscillations, the strong sensitivity to temperature that is apparent in Fig.

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


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