We report observations of an electric-field threshold conduction and of related ac voltage (broad-band noise) generation in low-disorder two-dimensioanl electron systems in the extreme magnetic quantum limit. We interpret these phenomena as definitive evidence for formation of a pinned quantum Wigner crystal and determine its melting phase diagram from the disappearance of threshold and noise behavior at higher temperatures.
|Original language||English (US)|
|Number of pages||4|
|Journal||Physical review letters|
|State||Published - 1990|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)