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|Abstract:||We study the critical spin-polarization energy (αC) above which fractional quantum Hall states in two-dimensional electron systems confined to symmetric GaAs quantum wells become fully spin polarized. We find a significant decrease of αC as we increase the well width. In systems with comparable electron layer thickness, αC for fractional states near Landau level filling ν=3/2 is about twice larger than those near ν=1/2, suggesting a broken particle-hole symmetry. Theoretical calculations, which incorporate Landau level mixing through an effective three-body interaction, and finite layer thickness capture certain qualitative features of the experimental results.|
|Electronic Publication Date:||8-Aug-2014|
|Citation:||Liu, Yang, Hasdemir, S, Wójs, A, Jain, JK, Pfeiffer, LN, West, KW, Baldwin, KW, Shayegan, M. (2014). Spin polarization of composite fermions and particle-hole symmetry breaking. Physical Review B, 90 (8), 10.1103/PhysRevB.90.085301|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||Physical Review B|
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