Paper Title:
Configuration of DV Complexes In Ge: Positron Probing of Ion Cores
  Abstract

Angular correlation of annihilation radiation technique (ACAR) has been used for studying a microstructure of the vacancy-group-V-impurity complexes (DV) formed by irradiation with 60Co γ – rays at Tirr. ≈ 280K in oxygen-lean n-Ge doped with group-V-impurity atoms As, Sb, and Bi. The probability of annihilation of positrons with the core electrons of DV complexes to be reconstructed from ACAR spectra has been analyzed on the basis of Chapman-Kolmogorov formalism; the Coulomb repulsion is proved to regulate the penetration of a positron into Ge4+ and D5+ ion cores. In passing from AsV to SbV and BiV complexes the ion cores D5+ are found to contribute more effectively to the probability of the positron annihilation in the core region. These data correlate well with the augmentation of the entropy of ionization (4S ~ 2,9 ÷ 4,2K) observed by means of capacitance transient techniques with the use of Au-Ge Schottky barriers in the same row of a similar vacancy-impurity complexes. The results obtained by ACAR spectroscopy suggest the full-vacancy configuration of DV pair with relaxation of atoms inward towards the vacancy.

  Info
Periodical
Solid State Phenomena (Volumes 131-133)
Edited by
A. Cavallini, H. Richter, M. Kittler and S. Pizzini
Pages
89-94
DOI
10.4028/www.scientific.net/SSP.131-133.89
Citation
N.Y. Arutyunov, V. V. Emtsev, E. Sayed , R. Krause-Rehberg, "Configuration of DV Complexes In Ge: Positron Probing of Ion Cores", Solid State Phenomena, Vols. 131-133, pp. 89-94, 2008
Online since
October 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Atsuo Kawasuso, Masahito Yoshikawa, Masaki Maekawa, Hisayoshi Itoh, Toshinobu Chiba, F. Redmann, Reinhard Krause-Rehberg, Michael Weidner, Thomas Frank, Gerhard Pensl
477
Authors: N.Yu. Arutyunov, Valentin V. Emtsev
Abstract:A probing of the atomic environment of positron in Cz-Si single crystal heat-treated at T=600C and T=450C has been performed by...
615
Authors: N.Yu. Arutyunov, Valentin V. Emtsev, Reinhard Krause-Rehberg
Abstract:The electron momentum distribution and microstructure of centers incorporating a vacancy (vacancies) and a group-V-impurity atom (P, As, Sb,...
455