Interference and interactions inmesoscopic rings

نویسندگان

  • Jari M. Kinaret
  • Mats Jonson
  • Robert I. Shekhter
  • Sebastian Eggert
چکیده

We consider a mesoscopic ring connected to external reservoirs by tunnel junctions. The ring is capacitively coupled to an external gate electrode and may be pierced by a magnetic eld. Due to strong electron–electron interactions within the ring the conductance shows Coulomb blockade oscillations as a function of the gate voltage, while Aharonov–Bohm interference e ects lead to a dependence on the magnetic ux. The Hamiltonian of the ring is given by a Luttinger model that allows for an exact treatment of both interaction and interference e ects. We conclude that the positions of conductance maxima as a function the external parameters can be used to determine the interaction parameter g, and the shapes of conductance peaks are strongly a ected by electron correlations within the ring. ? 1997 Elsevier Science B.V. All rights reserved.

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تاریخ انتشار 1997