title: Activated transport in the separate layers that form the nuT=1 exciton condensate.
abstract: 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.
authors.affiliation: Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany.
authors.forename: R D
authors.initials: RD
authors.lastname: Wiersma
authors.forename: J G S
authors.initials: JG
authors.lastname: Lok
authors.forename: S
authors.initials: S
authors.lastname: Kraus
authors.forename: W
authors.initials: W
authors.lastname: Dietsche
authors.forename: K
authors.initials: K
authors.lastname: von Klitzing
authors.forename: D
authors.initials: D
authors.lastname: Schuh
authors.forename: M
authors.initials: M
authors.lastname: Bichler
authors.forename: H-P
authors.initials: HP
authors.lastname: Tranitz
authors.forename: W
authors.initials: W
authors.lastname: Wegscheider