Phys. Rev. Lett. 89, 116802 (2002) [4 pages]Phase Diagram of Interacting Composite Fermions in the Bilayer ν=2/3 Quantum Hall EffectReceived 13 December 2001; published 23 August 2002 We study the phase diagram of composite fermions (CFs) in the presence of spin and pseudospin degrees of freedom in the bilayer ν=2/3 quantum Hall (QH) state. Activation studies elucidate the existence of three different QH states with two different types of hysteresis in the magnetotransport. While a noninteracting CF model provides a qualitative account of the phase diagram, the observed renormalization of tunneling gap and a non-QH state at high densities are not explained in the noninteracting CF model, and are suggested to be manifestations of interactions between CFs. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.116802
DOI:
10.1103/PhysRevLett.89.116802
PACS:
73.43.Nq, 71.10.Pm, 73.21.Fg
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