Simultaneous excitation of spins and pseudospins in the bilayer ν=1 quantum Hall state
Abstract
The tilting angular dependence of the energy gap was measured in the bilayer quantum Hall state at the Landau level filling ν=1 by changing the density imbalance between the two layers. The observed gap behavior shows a continuous transformation from the bilayer balanced density state to the monolayer state. Even a sample with 33 K tunneling gap shows the same activation energy anomaly reported by Murphy et al. (Phys. Rev. Lett. 72 (1994) 728). We discuss a possible relation between our experimental results and the quantum Hall ferromagnet of spins and pseudospins.
- Publication:
-
Physica E Low-Dimensional Systems and Nanostructures
- Pub Date:
- April 2004
- DOI:
- 10.1016/j.physe.2003.11.214
- arXiv:
- arXiv:cond-mat/0403512
- Bibcode:
- 2004PhyE...22...52T
- Keywords:
-
- Quantum Hall effect;
- Bilayer system;
- Skyrmion;
- Meron-pair;
- Condensed Matter - Mesoscopic Systems and Quantum Hall Effect;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 4 pages, 4 figures