Quantum point contact due to Fermi-level pinning and doping profiles in semiconductor nanocolumns

K. M. Indlekofer; M. Goryll; J. Wensorra; M. I. Lepsa

doi:10.1007/s00339-007-3900-5

Quantum point contact due to Fermi-level pinning and doping profiles in semiconductor nanocolumns

K. M. Indlekofer, M. Goryll, J. Wensorra, M. I. Lepsa

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

We show that nanoscale doping profiles inside a nanocolumn in combination with Fermi-level pinning at the surface give rise to the formation of a saddle-point in the potential profile. Consequently, the lateral confinement inside the channel varies along the transport direction, yielding an embedded quantum point contact. An analytical estimation of the quantization energies is given.

Original language	English (US)
Pages (from-to)	559-562
Number of pages	4
Journal	Applied Physics A: Materials Science and Processing
Volume	87
Issue number	3
DOIs	https://doi.org/10.1007/s00339-007-3900-5
State	Published - Jun 2007
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)

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10.1007/s00339-007-3900-5

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abstract = "We show that nanoscale doping profiles inside a nanocolumn in combination with Fermi-level pinning at the surface give rise to the formation of a saddle-point in the potential profile. Consequently, the lateral confinement inside the channel varies along the transport direction, yielding an embedded quantum point contact. An analytical estimation of the quantization energies is given.",

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AU - Lepsa, M. I.

PY - 2007/6

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N2 - We show that nanoscale doping profiles inside a nanocolumn in combination with Fermi-level pinning at the surface give rise to the formation of a saddle-point in the potential profile. Consequently, the lateral confinement inside the channel varies along the transport direction, yielding an embedded quantum point contact. An analytical estimation of the quantization energies is given.

AB - We show that nanoscale doping profiles inside a nanocolumn in combination with Fermi-level pinning at the surface give rise to the formation of a saddle-point in the potential profile. Consequently, the lateral confinement inside the channel varies along the transport direction, yielding an embedded quantum point contact. An analytical estimation of the quantization energies is given.

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Quantum point contact due to Fermi-level pinning and doping profiles in semiconductor nanocolumns

Abstract

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