EPR in Semiconductors

Spin-Hamiltonian parameter database for EPR centers in semiconductors

Help top | Policy | How to prepare *.inp file | Command lines | Author's comment lines | S and I | SH parameter matrices | Rotation matrices | Angular parameters | Transition tables | Parameter output(*.out file) | Graph output(*.plt file) | S=1/2 | S=1/2, I=1/2 | S=1

Author's comment lines

Label:G6(Six2)
Author:T. Umeda
Reference:J.W. Corbett, G.D. Watkins, Phys. Rev. Lett. 7, 314 (1961);G.D. Watkins,
J.W. Corbett, Phys. Rev. 138, A543 (1965).
Origin:V2(+)
Sample:low-resistivity p-Si irradiated by 1.5-MeV electrons
Symmetry:Monoclinic-I
Temperature:20K
Coordinate:x=[100],y=[011],z=[0-11]
RelativeIntensity:0.0934
OtherRemarks:Generation rate=0.008defects/cm3 per electron/cm2,
strongly temperature-dependent.

General

Author can describe instructions for the parameter file in terms of the following 10 items. These do not affect on EPR-NMR simulations but only on the appearance of the Database. Each comment should be described in a single line. There are no limits in length and their order.

When the file was uploaded to the Database, other useful comments (g/A/D values, version, date, etc.) are automatically added.

Note that the original EPR-NMR program allows only a single comment line. So, if you run a downloaded parameter file in your own computer, you have to remove redundant comment lines.

Format details

The items in the bracket [ ] can be omitted, but a full set is recommended in order to raise the usability of the parameters.

Label: name of the EPR center.

Author: your name. This item will explicitly represent your contribution to the Database. We think that anonymous author is not appropriate, because the reliability of such a file becomes unclear. Also DO NOT write your account name, because of keeping the network security.

Reference: source of the present SH parameter matrices. Your submission is also welcome if the data are “unpublished” or “to be published”.

[Origin]: origin of the EPR center.

[Symmetry]: symmetry of the EPR center.

[Sample], [Temperature]: sample(s) and temperature(s) that were used for determining the present SH parameter matrices.

Coordinate: the Cartesian coordinate for SH parameter matrices and rotation matrices. Angular dependence simulations are also performed with respect to this coordinate. We kindly recommend you to use the default coordinate in the existing files, which will be convenient for you as well as many users. If you use an original coordinate, you have to change not only this comment line but also rotation matrices by yourself.

[RelativeIntensity]: this value represents a relative intensity of the relevant EPR spectrum, as compared to that of other EPR spectra generated from the common folder. This item is useful for ´run all¡-type EPR-spectrum simulations to superpose all simulated EPR spectra with the correct weight ratios. For this example, the value of 0.934 means that its relative intensity is set to 0.467x2 (=[natural abundance of 29Si x2]). If the folder contains only a single file, this item is neglected.

[OtherRemarks]: any information you want to remark about this EPR center or this file.