
Photoinduced transport and selfconsistency in a quantum wire
A. Fechner , G. Cuniberti, M. Sassetti, and B. Kramer
LOCALIZATION 1999: Disorder and Interaction in Transport Phenomena
1999.0708; Hamburg, Germany
 We investigate the timedependent transport properties
of a singlechannel quantum wire with a barrier in the
presence of electronelectron interactions exploiting
the Luttinger model [1,2]. In the stationary limit, the
system exhibits a nonlinear IV
characteristic due to the presence of both, the barrier
and the electronelectron interactions [3]. In
frequencydependent transport, the dynamical interplay
between chargecurrents and electromagnetic fields has
to be considered, especially in the presence of
nonlinear effects [4]. The electromagnetic properties
are governed by Maxwell's equations which are
applicable only in three dimensions and in the presence
of Coulomb interaction. Currents as a consequence of
fields are calculated microscopically by using the path
integral method. We introduce and discuss a formalism
permitting a selfconsistent treatment of
chargecurrent and electromagnetic fields. In
particular, we consider the dcphoto induced current
and harmonic generation which are not driven by an
external field alone but by the superposition of the
external field and the induced field generated by the
system. We discuss the influence of the spatial shape
of a monochromatic driving field of frequency , on
the transport properties. Due to the nonlinearity, the
photocurrent contains contributions due to harmonics
of the driving field. It is found that the occupation
probabilities of these sidebands depend on the spatial
range of the driving electric field.
[1] F. D.
M. Haldane, J. Phys. C 14 (1981) 2585. [2] J.
Voit, Rep. Prog. Phys. 58 (1995) 977. [3] C.
L. Kane, M. P. A. Fisher, Phys. Rev. B 46 (1992)
15233. [4] O. Keller, Phys. Rep. 268 (1996)
85.



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Prof. Dr. Gianaurelio Cuniberti
secretariat:
postal address:
Institute for Materials Science
TU Dresden
01062 Dresden, Germany
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