Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
71 (1997), S. 497-499
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
A method of producing lateral confinement of an electron gas has been realized by using molecular beam epitaxy to grow a high mobility heterostructure on a (100) n+-GaAs layer selectively etched to create a two-dimensional array of cavities through the n+-GaAs, which are bound by higher index facets. Far-infrared cyclotron resonance (CR) spectra unambiguously demonstrate that the electron gas formed inside the cavities is confined in both lateral directions. Typical confinement energies of 30 cm−1 and widths of 2000 nm are derived from the spectra and magnetoresistance measurements. The effect of different n+-GaAs backgate biases is also investigated. Combining information from CR spectra with atomic force microscopy images provides a picture of the nature of the lateral confinement in this structure. © 1997 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.119589
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