Speaker
Prof.
Moty Heiblum
(Weizmann Institute, Israel)
Description
Abstract: Electron pairing is a rare phenomenon appearing
only in a few unique physical systems, such as
superconductors or Kondo-correlated quantum-dots. Here,
we report on an unexpected “pairing” of electrons in the
integer-quantum Hall effect (IQHE) regime. The pairing
takes place in the interfering most outer edge channel
within an electronic Fabry-Perot interferometer at a bulk
filling factor ν_B > 2. We note three clear observations: (a)
Aharonov-Bohm oscillations with magnetic-flux periodicity
φ_0* = h/2e, with e the electron charge and h Planck’s
constant; (b) An interference charge e* = 2e – revealed by
shot noise measurements; and (c) Entanglement between
the two most outer edge channels. While the exact
mechanism of the pairing is not understood, we show that
this unique phenomenon results from inter-edge channels
interactions.
