Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
56 (1990), S. 454-456
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Remotely doped parabolic quantum wells have been used to produce thick (〉2000 A(ring)) layers of high-mobility electron systems. Using a front gate electrode we are able to simultaneously deplete the well and change the actual thickness of this quasi-three-dimensional system. Thus, we can successively depopulate the elecrical subbands in the well, leading to step-like changes in the gate to channel capacitance. This yields direct insight into the subband structure of the electron system and allows its spectroscopy without the need of a magnetic field. The experimental results are compared with those of a self-consistent subband calculation and we obtain a qualitative agreement.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.102763
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