  A search for non-resonant new phenomena, originating from either contact
interactions or large extra spatial dimensions, has been carried out using
events with two isolated electrons or muons. These events, produced at the LHC
in proton-proton collisions at sqrt(s) = 7 TeV, were recorded by the ATLAS
detector. The data sample, collected throughout 2011, corresponds to an
integrated luminosity of 4.9 and 5.0 fb-1 in the e+e- and mu+mu- channels,
respectively. No significant deviations from the Standard Model expectation are
observed. Using a Bayesian approach, 95% confidence limit lower limits ranging
from 9.0 to 13.9 TeV are placed on the energy scale of llqq contact
interactions in the left-left isoscalar model. Lower limits ranging from 2.4 to
3.9 TeV are also set on the string scale in large extra dimension models. After
combination of these limits with results from a similar search in the diphoton
channel, slightly more stringent limits are obtained.
