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

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

Research output: Contribution to journalArticle

3 Citations (Scopus)

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 languageEnglish (US)
Pages (from-to)559-562
Number of pages4
JournalApplied Physics A: Materials Science and Processing
Volume87
Issue number3
DOIs
StatePublished - Jun 2007
Externally publishedYes

Fingerprint

Point contacts
Fermi level
Doping (additives)
Semiconductor materials
saddle points
profiles
Direction compound
energy

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Quantum point contact due to Fermi-level pinning and doping profiles in semiconductor nanocolumns. / Indlekofer, K. M.; Goryll, Michael; Wensorra, J.; Lepsa, M. I.

In: Applied Physics A: Materials Science and Processing, Vol. 87, No. 3, 06.2007, p. 559-562.

Research output: Contribution to journalArticle

@article{7f48d5cf72c64bcaa0c145fb78e5ad9c,
title = "Quantum point contact due to Fermi-level pinning and doping profiles in semiconductor nanocolumns",
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.",
author = "Indlekofer, {K. M.} and Michael Goryll and J. Wensorra and Lepsa, {M. I.}",
year = "2007",
month = "6",
doi = "10.1007/s00339-007-3900-5",
language = "English (US)",
volume = "87",
pages = "559--562",
journal = "Applied Physics",
issn = "0340-3793",
publisher = "Springer Heidelberg",
number = "3",

}

TY - JOUR

T1 - Quantum point contact due to Fermi-level pinning and doping profiles in semiconductor nanocolumns

AU - Indlekofer, K. M.

AU - Goryll, Michael

AU - Wensorra, J.

AU - Lepsa, M. I.

PY - 2007/6

Y1 - 2007/6

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.

UR - http://www.scopus.com/inward/record.url?scp=33947234552&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33947234552&partnerID=8YFLogxK

U2 - 10.1007/s00339-007-3900-5

DO - 10.1007/s00339-007-3900-5

M3 - Article

AN - SCOPUS:33947234552

VL - 87

SP - 559

EP - 562

JO - Applied Physics

JF - Applied Physics

SN - 0340-3793

IS - 3

ER -