TY - JOUR
T1 - Role of Density Imbalance in an Interacting Bilayer Hole System
AU - Tutuc, E.
AU - Melinte, S.
AU - De Poortere, E. P.
AU - Pillarisetty, R.
AU - Shayegan, M.
PY - 2003/8/13
Y1 - 2003/8/13
N2 - We study interacting GaAs hole bilayers in the limit of zero interlayer tunneling. When the layers have equal density, we observe a phase-coherent bilayer quantum Hall state (QHS) at a total filling factor [Formula presented], flanked by a reentrant insulating phase at nearby fillings which suggests the formation of a pinned, bilayer Wigner crystal. As we transfer charge from one layer to another, the phase-coherent QHS becomes stronger, evincing its robustness against charge imbalance, but the insulating phase disappears, suggesting that its stability requires the commensurability of the two layers.
AB - We study interacting GaAs hole bilayers in the limit of zero interlayer tunneling. When the layers have equal density, we observe a phase-coherent bilayer quantum Hall state (QHS) at a total filling factor [Formula presented], flanked by a reentrant insulating phase at nearby fillings which suggests the formation of a pinned, bilayer Wigner crystal. As we transfer charge from one layer to another, the phase-coherent QHS becomes stronger, evincing its robustness against charge imbalance, but the insulating phase disappears, suggesting that its stability requires the commensurability of the two layers.
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U2 - 10.1103/PhysRevLett.91.076802
DO - 10.1103/PhysRevLett.91.076802
M3 - Article
C2 - 12935040
AN - SCOPUS:0141459562
SN - 0031-9007
VL - 91
JO - Physical review letters
JF - Physical review letters
IS - 7
ER -