Weak localization in chaotic electron billiards: The effect of imperfect coupling to the leads
Max-Planck-Institut für Kernphysik - 69029 Heidelberg, Germany
Accepted: 28 July 1996
We calculate the conductance of a chaotic electron billiard as a function of magnetic flux, channel number and transmission coefficients (TC). The latter describe the strength of the coupling between leads and billiard. Gating of either lead may reduce this strength. We find that outside the Coulomb blockade regime, the weak-localization curve (WLC) for the average conductance is always Lorentzian. Height and width of the Lorentzian depend sensitively upon the TC, especially in the case of asymmetric gating of the two leads. These predictions can be tested experimentally.
PACS: 73.20.Fz – Weak localization effects (e.g., quantized states) / 05.45.+b – Theory and models of chaotic systems / 72.20.Dp – General theory, scattering mechanisms
© EDP Sciences, 1996