Interaction-induced damping of Aharonov-Bohm oscillations

•Thomas Ludwig1,2 und Alexander Mirlin1,2
1Institut für Nanotechnologie, Forschungszentrum Karlsruhe, 76021 Karlsruhe, Germany
2Institut für Theorie der Kondensierten Materie, Universität Karlsruhe, 76128 Karlsruhe, Germany

We study the amplitudes of mesoscopic Aharonov-Bohm oscillations in diffusive metallic rings in the presence of electron-electron interaction. In the limit of strong dephasing we derive an analytical expression for the damping of the oscillations. The dephasing behaviour is qualitatively different from other situations because although Lj is much shorter than the system size the dephasing mechanism is governed by energy transfers determined by the system size.