https://doi.org/10.1007/s100510050327
Non-linear response and electron-electron interactions in mesoscopic metal rings
Institut für Theoretische Physik der Universität Göttingen,
Bunsenstrasse 9, 37073 Göttingen, Germany
Received:
5
September
1997
Accepted:
4
November
1997
Published online: 15 June 1998
A time-dependent
electric field
gives rise to a stationary non-equilibrium
current 
around a
mesoscopic metal ring threaded by a magnetic flux.
We show that this current,
which is proportional to the intensity of the field,
is closely related to the
exchange part of the interaction contribution
to the equilibrium
persistent current, and that the
corresponding non-linear conductivity
directly measures the weak localization correction
to the polarization.
We explicitly calculate the disorder average
of in the diffusive regime
as function of the frequency of the electric
field and the static flux piercing the ring, and
suggest an experiment to test our theory.
PACS: 73.50.Bk – General theory, scattering mechanisms / 72.10.Bg – General formulation of transport theory / 72.15.Rn – Quantum localization
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1998
