Onset of interlayer phase coherence in a bilayer twodimensional electron system: Effect of layer density imbalance
Abstract
Tunneling and Coulomb drag are sensitive probes of spontaneous interlayer phase coherence in bilayer twodimensional electron systems at total Landau level filling factor ν_{T}=1 . We find that the phase boundary between the interlayer phase coherent state and the weakly coupled compressible phase moves to larger layer separations as the electron density distribution in the bilayer is imbalanced. The critical layer separation increases quadratically with layer density difference.
 Publication:

Physical Review B
 Pub Date:
 August 2004
 DOI:
 10.1103/PhysRevB.70.081303
 arXiv:
 arXiv:condmat/0406067
 Bibcode:
 2004PhRvB..70h1303S
 Keywords:

 73.40.c;
 73.20.r;
 73.63.Hs;
 Electronic transport in interface structures;
 Electron states at surfaces and interfaces;
 Quantum wells;
 Condensed Matter  Mesoscopic Systems and Quantum Hall Effect
 EPrint:
 4 pages, 3 figures