Observation of single-defect relaxation in a freely suspended nano resonatorF. W. Beil, R. H. Blick, A. Wixforth, W. Wegscheider, D. Schuh and M. BichlerEurophys. Lett., 76 6 (2006) 1207-1213DOI: https://doi.org/10.1209/epl/i2006-10379-x