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Title: Effects of local electric surface potential on holes charging process in uncapped germanium nanocrystal

The charging kinetics of holes are investigated in an uncapped Ge nanocrystal by the use of the nano-electron beam induced current technique. The charging process is studied under zero volt or under an appropriate electric field. The investigation is repeated many times on the same nanocrystal and on others in the same sample to attest of the reproducibility of the results. At 0 V, the cycles of charging kinetics are superimposed and are in a steady state, but an instantaneous local and negative surface potential, established in the nanocrystal at the beginning of the kinetics, slows down the holes charging process. Under an external field, the energy band bending accentuation affects the holes charging time constants. As a result, the holes charging cycles weakly affect the electrical performance of the thin oxide as is indicated by the value of the measured local resistivity of 6 × 10{sup 10}–10{sup 11} Ω cm, which is relatively lower than that of the thick thermal oxide.
Authors:
;  [1]
  1. Laboratoire de Recherche en Nanosciences, Bât. 6, case n 15, UFR Sciences, Université de Reims Champagne Ardenne, 51687 Reims Cedex 2 (France)
Publication Date:
OSTI Identifier:
22402871
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 15; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ELECTRIC CONDUCTIVITY; ELECTRIC FIELDS; GERMANIUM; HOLES; KINETICS; NANOSTRUCTURES; OXIDES; SCANNING ELECTRON MICROSCOPY; STEADY-STATE CONDITIONS; SURFACE POTENTIAL