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Transport measurements are presented on a class of electrostatically definedlateral dots within a high mobility two dimensional electron gas (2DEG). Thenew design allows Coulomb Blockade(CB) measurements to be performed on a singlelateral dot containing 0, 1 to over 50 electrons. The CB measurements areenhanced by the spin polarized injection from and into 2DEG magnetic edgestates. This combines the measurement of charge with the measurement of spinthrough spin blockade spectroscopy. The results of Coulomb and spin blockadespectroscopy for first 45 electrons enable us to construct the additionspectrum of a lateral device. We also demonstrate that a lateral dot containinga single electron is an effective local probe of a 2DEG edge.Comment: 4 pages, 4 figures submitted to Physical Review

Addition spectrum of a lateral dot from Coulomb and spin-blockade spectroscopy