Abstract
We review our work on studies of high-frequency conductance in two-dimensional high-mobility electronic systems in wide n-AlGaAs/GaAs/AlGaAs quantum wells. Using simultaneous measurements of the attenuation and velocity of a surface acoustic wave we have found both real and imaginary components of the complex high-frequency conductance. Based on the experimental results and their analysis we conclude that close to the filling factor v = 1/5, as well as in the interval 0.18 > v > 0.125, a Wigner crystal pinned by disorder is formed. Both the melting temperature and the correlation length of the pinning-induced domains in the Wigner crystal are found. In close vicinities of v = 1 and 2 transitions from single-electron localization to a Wigner crystal were observed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 104-114 |
| Number of pages | 11 |
| Journal | Fizika Nizkikh Temperatur |
| Volume | 43 |
| Issue number | 1 |
| State | Published - Jan 2017 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy
Keywords
- High-frequency transport
- Two-dimensional electron gas