Showing papers on "Quantum capacitance published in 1998"
06 Jul 1998
TL;DR: A fully inductive technique has been used to observe the quantum Hall effect without any electrical connection to the two-dimensional electron gas.
Abstract: A fully inductive technique has been used to observe the quantum Hall effect without any electrical connection to the two-dimensional electron gas. The ac response of the measuring system is described by a model taking into account the effect of the intrinsic capacitance of the Corbino ring. This internal capacitance is on the order of 100 pF/m for a 1 mm wide sample, a value which is not negligible in the field of ac quantum metrology.
7 citations
TL;DR: The tunneling thresholds are determined by means of a formalism based on the minimization of the system free energy and Luryi's quantum capacitance formula and the concept of capacitance and differential capacitance are discussed together with their applicability to systems characterized by single electron tunneling.
Abstract: We have studied the capacitance between two parallel plates enclosing a quantum confined
system and its dependence on the applied voltage. The concepts of capacitance and differential
capacitance are discussed together with their applicability to systems characterized by
single.electron tunneling. We determine the tunneling thresholds by means of a formalism
based on the minimization of the system free energy and we retrieve, as a special case,
Luryi's quantum capacitance formula. We apply our method to the study of an idealized system
made up of a number of quantum dots with random size distributed according to a gaussian.
Results are shown for different choices of the position of the dots between the plates and
of the voltage span applied to perform the measurement of the differential capacitance.
4 citations