Abstract
Optical absorption spectroscopy has been used to explore the phase diagram of the double layer electron system at v = 1. Absorption spectroscopy is shown to be sensitive to the evolution of the electron system from a regime in which a gap in the single-particle tunneling spectrum accounts for the quantized Hall state to a regime of weak tunneling in which inter-layer Coulomb interactions determine the nature of the excitation gap. Qualitative differences in magnetic field and temperature dependence of spectra are observed depending on the relative size of the single-particle tunneling gap. Most intriguingly, our measurements of samples in the regime of weak tunneling do not display a quenching of absorption intensity at v = 1 characteristic of the quantum Hall effect.
Original language | English (US) |
---|---|
Pages (from-to) | 590-593 |
Number of pages | 4 |
Journal | Physica E: Low-Dimensional Systems and Nanostructures |
Volume | 6 |
Issue number | 1 |
DOIs | |
State | Published - Feb 2000 |
Externally published | Yes |
Event | 13th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-13) - Ottawa, Ont, Can Duration: Aug 1 1999 → Aug 6 1999 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics