Observation of a Pinning Mode in a Wigner Solid with ν=1/3 Fractional Quantum Hall Excitations
Abstract
We report the observation of a resonance in the microwave spectra of the real diagonal conductivities of a two-dimensional electron system within a range of ∼±0.015 from filling factor ν=1/3. The resonance is remarkably similar to resonances previously observed near integer ν, and is interpreted as the collective pinning mode of a disorder-pinned Wigner solid phase of e/3-charged carriers.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 2010
- DOI:
- 10.1103/PhysRevLett.105.126803
- arXiv:
- arXiv:1006.2335
- Bibcode:
- 2010PhRvL.105l6803Z
- Keywords:
-
- 73.43.-f;
- 32.30.Bv;
- 73.21.-b;
- Quantum Hall effects;
- Radio-frequency microwave and infrared spectra;
- Electron states and collective excitations in multilayers quantum wells mesoscopic and nanoscale systems;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Quantum Gases;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- version with edits for clarity, improved Figure 3 and added reference