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

By Peter W. Hawkes (Ed.)

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, picture technological know-how and electronic photo 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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14. The plots were obtained at three different gate voltages and the darker regions correspond to enhanced probability density. A typical dot profile is shown in the upper left figure. (See also Plate 5 . , 1996). An example of one such contour is plotted in Fig. 17, in which the color scale indicates the measured variation of dot conductance with magnetic field and gate voltage. While a direct comparison to the form of Fig. 3 (in which the variation of magneto-conductance with energy is instead computed) cannot be made here, for now we are at least encouraged by observation of the well-defined striations that run through the experimental plot.

BIRD, R. AKIS, D. K. FERRY, AND M. 5 MAGNETIC FIELD (TESLA) FIGURE28. 4 x 10’’ m - 2 and p = 40 mZ/vs). 6 e2/h. fluctuations. The difference in amplitude suggests a considerable difference in phase-breaking time between the two dots. This poor correlation of phase coherence to the average properties of the host substrate is further illustrated in Fig. 29, in which we compare the lead opening dependence of the phase-breaking time, measured in three different dots. Note how the two dots fabricated in the lower quality material exhibit no noticeable variation in phase coherence with lead opening, while the higher mobility one shows an order of magnitude change.

K. FERRY, A N D M. STOPA MAGNETIC FIELD (TESLA) FIGURE18. 3-pm quantum dot. The well-defined lines indicated by the arrows correspond to lines of constant scarring. ) postpone a discussion of this issue for now, however, until the role of electron dephasing in these structures has been considered. Iv. WEAK-FIELD MAGNETO-TRANSPORT IN OPEN QUANTUM DOTS: HIGH-TEMPERATURE PROPERTIES While we have suggested that the transport properties of open quantum dots are strongly influenced by electron interference, we have thus far neglected the fact that the wave-like nature of the electrons is not preserved indefinitely in condensed matter systems (Ferry and Goodnick, 1997).

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