Measurements of the reflection and transmission coefficients of ballistic two-dimensional electrons by a potential barrier, induced via a surface gate, reveal that both coefficients vary gradually with the barrier height when it is less then the electron Fermi energy. Superimposed on the gradual variation, oscillatory structure which are consistent with interference resonances are also observed. The data imply that the potential barrier seen by the two-dimensional electrons is sharp compared to the electron wavelength.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)