| Literature DB >> 15698006 |
R D Wiersma1, J G S Lok, S Kraus, W Dietsche, K von Klitzing, D Schuh, M Bichler, H-P Tranitz, W Wegscheider.
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.Year: 2004 PMID: 15698006 DOI: 10.1103/PhysRevLett.93.266805
Source DB: PubMed Journal: Phys Rev Lett ISSN: 0031-9007 Impact factor: 9.161