We observe a sharp feature in the ultra-low-temperature magnetoconductivity of degenerately doped Ge:Sb at H25 kOe, which is robust up to at least three times the critical density for the insulator-metal transition. This field corresponds to a low-energy scale characteristic of the special nature of antimony donors in germanium. Its presence and sensitivity to uniaxial stress confirm the notion of metallic impurity bands in doped germanium.
|Original language||English (US)|
|Number of pages||4|
|Journal||Physical Review B|
|State||Published - 1990|
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics