科研之友
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摘要
Green function method is applied to the solution of Schrodinger equation in two-dimensions where there is a constant and nearly uniform magnetic field B-o applied perpendicularly and there are infinitesimally weak scatterers within the system. Electronic density of states n(E) obtained from the average Green function go is a continuous function of energy E and not in the form of discrete Landau spikes even in the pure system with no disorder. Self consistent calculation of self-energy gives two possible scattering time values, one leading to resistance increase with Bo while the other causing decrease in resistance.
- 出版日期2013-12-1
