Hall effect mean free path

Again, the Hall effect remains a difficulty. Holstein (1961) and Holstein and Friedman (1968) and Friedman (1971) are among several workers who have considered how the Hall coefficient should be calculated for systems in which the electronic wave functions are localised. Friedman has used his theory to obtain a numerical estimate for R in short mean free path situations. He finds that Ra is independent of temperature and approximately T... 

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