Skip to main content
placeholder image

Magnetotunneling measurement of space-charge accumulation in -doped quantum wells

Journal Article


Abstract


  • Resonant tunneling wells with approximately V-shaped profiles have been fabricated by '-doping AlxGa1-xAs tunnel barriers. The structures show strong resonances in their current-voltage characteristics in qualitative agreement with the expected subband structure. Magnetotunneling experiments are shown to measure the electron density in the lowest subband which displays a strong asymmetry as a function of the bias voltage. This is indicative of an extremely asymmetric electric field distribution within the structure and is explained by a consideration of the dynamics of the electrons tunneling into, or out of, a slightly asymmetric well. The implications for asymmetries in other semiconductor structures are pointed out. © 1989 The American Physical Society.

Publication Date


  • 1989

Citation


  • Bending, S., Zhang, C., Klitzing, K. V., & Ploog, K. (1989). Magnetotunneling measurement of space-charge accumulation in -doped quantum wells. Physical Review B, 39(2), 1097-1103. doi:10.1103/PhysRevB.39.1097

Scopus Eid


  • 2-s2.0-35949011838

Start Page


  • 1097

End Page


  • 1103

Volume


  • 39

Issue


  • 2

Abstract


  • Resonant tunneling wells with approximately V-shaped profiles have been fabricated by '-doping AlxGa1-xAs tunnel barriers. The structures show strong resonances in their current-voltage characteristics in qualitative agreement with the expected subband structure. Magnetotunneling experiments are shown to measure the electron density in the lowest subband which displays a strong asymmetry as a function of the bias voltage. This is indicative of an extremely asymmetric electric field distribution within the structure and is explained by a consideration of the dynamics of the electrons tunneling into, or out of, a slightly asymmetric well. The implications for asymmetries in other semiconductor structures are pointed out. © 1989 The American Physical Society.

Publication Date


  • 1989

Citation


  • Bending, S., Zhang, C., Klitzing, K. V., & Ploog, K. (1989). Magnetotunneling measurement of space-charge accumulation in -doped quantum wells. Physical Review B, 39(2), 1097-1103. doi:10.1103/PhysRevB.39.1097

Scopus Eid


  • 2-s2.0-35949011838

Start Page


  • 1097

End Page


  • 1103

Volume


  • 39

Issue


  • 2