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I spent about 30 minutes working with the applet and reading the accompanying textual material. The applet gives a good qualitative sense of the Fermi level and temperature effects on the occupation of energy states. The supplementary material is very good. The applet is simple to use and serves its purpose. It could be used as tutorial or as a lecture/demo. The supplementary material provides a clear mathematical analysis of the occupation of energy states and a worksheet for students to check their understanding. In addition, the reference section gives links to many other sources that will be of interest to students seeking more information.
I occasionally had problems bringing up a couple of the supplementary textual pages using Netscape 4.76, but no problems with IE 5.5.
12 years ago
This Physlet offers a clear and concise presentation of how electron distribution depends on the two different parameters of temperature and Fermi energy level. The user may interact with the physlet by varying temperature for a given Fermi energy level and vice versa. By doing so the user may witness how the two different parameters have different effects on the distribution of electrons. The presentation, however, is somewhat stark in that it lacks context. Specifically, it seems almost necessary in an introductory discussion of Fermi statistics to briefly talk about the Boltzman and Bose-Einstein distributions, how they describe the behavior of particles other than electrons and how they compare with the electron distribution. In short this tutorial provides a clear yet brief introduction to Fermi statistics and how it explains the behavior of electrons in a solid.
It takes about an hour to hit every page of this physlet and do some of the calculations reqired in moving through the tutorial. A calculator at your side will help with the calculations. There is also a page designated for a quiz, however I could not find the quiz anywhere in the tutorial.
13 years ago
Very nice display of the Fermi level. Those taking an introductory course in solid state will appreciate this site. Applet worked fine. Accompanying explanations (which include problem sets) are first rate.