Frequency scaling and mode locking of photo-induced tunneling
G. Cuniberti , A. Fechner, M. Sassetti, and B. Kramer
Exotic States in Quantum Nanostructures
1999.08; Cumberland Lodge, Windsor, UK
I investigate the nonlinear AC transport trough a
quantum wire with an impurity in the presence of
finite range electron-electron interactions. I discuss
the influence of the spatial shape of the ac electric
field onto transport properties of the system and find
that the scaling behavior of the occupation
probability of the sidebands depends on the range of
the voltage drop. I observe a cross-over between the
Tien-Gordon like scaling of the sidebands and a regime
in which the scaling reflects the ranges of both, the
electron-electron interaction and the electric field.
Moreover, for intermediate interaction strengths, the
non-linear differential conductance shows cusp-like
periodic minima due to finite non-zero range of the
interaction but are independent of the shape of the
driving electric field.
1] G. Cuniberti, A. Fechner, M. Sassetti, and B.
Kramer, Europhys. Lett. 48, 66 (1999).
P.K. Tien, and J.P. Gordon, Phys. Rev. B
129, 647 (1963).
4] H.H. Lin, and M.P.A.
Fisher, Phys. Rev. B 54, 10593 (1996-I).
3] G. Cuniberti, M. Sassetti, and B. Kramer, Phys.
Rev. B 57, 1515 (1998).
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Prof. Dr. Gianaurelio Cuniberti
Institute for Materials Science
visitors and courier address:
01062 Dresden, Germany