Spectroscopy of the Potential Profile in a Ballistic Quantum Constriction

Details Spectroscopy of the Potential Profile in a Ballistic Quantum Constriction Spectroscopy of the Potential Profile in a Ballistic Quantum Constriction

1994-02-07

arxiv.org/abs/cond-mat/9402031v2

Physics

Condensed Matter

3 pages, 4 figures (availiable upon request), REVTEX, Applied Physics Report 93-57

Scientific paper

10.1103/PhysRevB.50.4590

We present a theory for the nonlinear current-voltage characteristics of a ballistic quantum constriction. Nonlinear features first develop because of above-barrier reflection from the potential profile, created by impurities in the vicinity of the constriction. The nonlinearity appears on a small voltage scale and makes it possible to determine distances between impurities as well as the magnitude of the impurity potentials.

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