RESISTANCE RESONANCES FOR RESONANT-TUNNELING STRUCTURES OF QUANTUM DOTS

By use of the generalized Breit-Wigner formula we find a broad class o f non-one-dimensional resonant-tunneling structures of quantum dots or atoms having exponentially high and narrow resistance resonances and conductance zero points. It is shown that in definite cases they corre spond to the exponentially narrow backscattering conductance resonance s near the levels of quantum dots. As examples, the structures of two, three, and four quantum dots are considered. The possibility of obser ving the resistance resonances by using the scanning tunneling microsc ope is discussed.