Activated transport in the separate layers that form the nuT=1 exciton condensate.
We observe the total filling factor nuT=1 quantum Hall state in a bilayer two-dimensional electron system with virtually no tunneling. We find thermally activated transport in the balanced system with a monotonic increase of the activation energy with decreasing d/lB below 1.65. In the imbalanced system we find activated transport in each of the layers separately, yet the activation energies show a striking asymmetry around the balance point, implying a different excitation spectrum for the separate layers forming the condensed state.
Wiersma
R D
RD
Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany.
Lok
J G S
JG
Kraus
S
S
Dietsche
W
W
von Klitzing
K
K
Schuh
D
D
Bichler
M
M
Tranitz
H-P
HP
Wegscheider
W
W