Abstract
A modulation-doped Al0.35Ga0.65As/GaAs single interface structure with a 700 Å undoped setback grown by solid-source molecular beam epitaxy (MBE) shows a Hall mobility of 11.7×106 cm2/V s at a carrier density of 2.4×1011 electrons/cm2 measured in van der Pauw geometry after exposure to light at 0.35 K. This is the highest carrier mobility ever measured in a semiconductor. Similar Al0.32Ga0.68As/GaAs structures with 1000-2000 Å setbacks show Hall mobilities in the dark at 0.35 K as high as 4.9×106 cm2 /V s for carrier densities of 5.4×1010 electrons/cm2 and lower.
Original language | English (US) |
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Pages (from-to) | 1888-1890 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 55 |
Issue number | 18 |
DOIs | |
State | Published - 1989 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)