TY - JOUR
T1 - Giant frictional drag in strongly interacting bilayers near filling factor one
AU - Tutuc, E.
AU - Pillarisetty, R.
AU - Shayegan, M.
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2009/1/5
Y1 - 2009/1/5
N2 - We study the frictional drag in high mobility, strongly interacting GaAs bilayer hole systems in the vicinity of the filling factor ν=1 quantum Hall state (QHS) at the same fillings where the bilayer resistivity displays a re-entrant insulating phase. Our measurements reveal a very large longitudinal drag resistivity (ρ xx D) in this regime, exceeding 15 kΩ/□ at filling factor ν=1.15. ρ xx D shows a weak temperature dependence and appears to saturate at a finite, large value at the lowest temperatures. Our observations are consistent with theoretical models positing a phase separation, e.g., puddles of ν=1 QHS embedded in a different state, when the system makes a transition from the coherent ν=1 QHS to the weakly coupled ν=2 QHS.
AB - We study the frictional drag in high mobility, strongly interacting GaAs bilayer hole systems in the vicinity of the filling factor ν=1 quantum Hall state (QHS) at the same fillings where the bilayer resistivity displays a re-entrant insulating phase. Our measurements reveal a very large longitudinal drag resistivity (ρ xx D) in this regime, exceeding 15 kΩ/□ at filling factor ν=1.15. ρ xx D shows a weak temperature dependence and appears to saturate at a finite, large value at the lowest temperatures. Our observations are consistent with theoretical models positing a phase separation, e.g., puddles of ν=1 QHS embedded in a different state, when the system makes a transition from the coherent ν=1 QHS to the weakly coupled ν=2 QHS.
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U2 - 10.1103/PhysRevB.79.041303
DO - 10.1103/PhysRevB.79.041303
M3 - Article
AN - SCOPUS:59749101193
VL - 79
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 4
M1 - 041303
ER -