Observation of exchange Coulomb interactions in the quantum Hall state at nu=3

A. B. Van’kov, 2 T. D. Rhone, A. Pinczuk, 3 I. V. Kukushkin, Loren N. Pfeiffer, and Ken W. West Institute of Solid State Physics, RAS, Chernogolovka, 142432 Russia Department of Physics, Columbia University, New York, New York 10027, USA Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, USA Bell Laboratories, Alcatel-Lucent, Murray Hill, New Jersey 07974, USA (Dated: November 10, 2010)