Dipolar interactions between dangling bonds at the (111) Si-SiO/sub 2/ interface

Journal Article · Mon Sep 15 04:00:00 EDT 1986 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.34.3610· OSTI ID:5038906

Brower, K L; Headley, T J

In this paper a computational model is developed which allows one to calculate the contribution to the Zeeman linewidth arising from magnetic dipole-dipole interactions between unpaired electrons in the dilute limit, which in our specific application correspond to dangling bonds (P-italic/sub b-italic/ centers) localized at the (111) Si-SiO/sub 2/ interface. Transmission-electron-microscopy studies of the samples we studied with electron paramagnetic resonance (EPR) indicate that the interface between the silicon and the thermally grown oxide was chemically abrupt and atomically flat over distances ranging from 15 to 300 A-circle. The atomic flatness of the silicon ''surface'' at the interface was interrupted by steps from one atomic (111) silicon plane to the next. Thus, the dangling bonds observed by EPR are believed to be essentially localized on a two-dimensional plane. The density of dangling bonds is between 3 x 10/sup 12/ and 5 x 10/sup 12/ cm/sup -2/, which suggests that resolved fine structure might be detectable as well as broadening of the P-italic/sub b-italic/ Zeeman resonance.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico 87185
• OSTI ID: 5038906
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 34:6; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
CHALCOGENIDES
CHEMICAL BONDS
CORRELATIONS
CRYSTAL FACES
DIPOLES
ELECTRON SPIN RESONANCE
ELEMENTS
INTERACTIONS
INTERFACES
LINE WIDTHS
MAGNETIC DIPOLES
MAGNETIC RESONANCE
MULTIPOLES
OXIDES
OXYGEN COMPOUNDS
RESONANCE
SEMIMETALS
SILICON
SILICON COMPOUNDS
SILICON OXIDES
ZEEMAN EFFECT