Abstract
Magnetorotons in the dispersion curves of collective gap excitation modes of fractional quantum Hall liquids are measured by resonant inelastic light scattering. Two deep magnetoroton minima are observed at ν = 2/5, while a single deep minimum is resolved at ν = 1/3. The results support Chern-Simons and composite fermion calculations that predict multiple roton minima for states with ν > 1/3.
Original language | English (US) |
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Pages (from-to) | 55-58 |
Number of pages | 4 |
Journal | Physica E: Low-Dimensional Systems and Nanostructures |
Volume | 12 |
Issue number | 1-4 |
DOIs | |
State | Published - Jan 2002 |
Externally published | Yes |
Event | 14th International Conference on the - Prague, Czech Republic Duration: Jul 30 2001 → Aug 3 2001 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
Keywords
- Collective excitation
- Fractional quantum Hall effect
- Inelastic light scattering