Abstract
The conductivity of the high magnetic field insulating phases of two-dimensional electron and hole systems (2DES and 2DHS) of sufficiently low disorder exhibits a resonance at microwave frequency. We present and compare results on this resonance in a moderate disorder 2DES and in a high quality 2DHS. The 2DES exhibits the resonance even though the high-B insulator is not reentrant around the 1/5 fractional quantum Hall effect. The resonance in the 2DHS is much sharper than that in the 2DES, and appears to be inconsistent with the standard model of a two-dimensional harmonic oscillator in a magnetic field.
Original language | English (US) |
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Pages (from-to) | 111-115 |
Number of pages | 5 |
Journal | Physica E: Low-Dimensional Systems and Nanostructures |
Volume | 1 |
Issue number | 1-4 |
DOIs | |
State | Published - Jan 19 1997 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
Keywords
- Microwave resonance
- Pinning mode
- Wigner crystal