diamond_co.m

Cobalt-related defect spin system for diamond. Magnetic parameters from Nadolinny et al., Crystals 7, 237 (2017), DOI link. The system contains one electron and one 59Co nucleus. The g-tensor and the cobalt hyperfine tensor of the selected centre are built in a common principal axis frame whose y axis is the [011] direction and whose x axis is tilted away from [100] by the angle reported for that centre; the frame is orthogonalised by QR decomposition and forced to be right-handed. The hyperfine principal values are given in the source in millitesla and are converted into Hz using the free electron magnetogyric ratio. Both tensors are then rotated by the matrix that aligns the requested crystal plane normal with the magnetic field direction, and returned in the zeeman.matrix and coupling.matrix fields.

Syntax

    [sys,inter]=diamond_co(parameters)

Parameters

    parameters is a structure with the following fields:

      .centre       - 'o4' or 'nlo2'
      .orientation  - '111', '110', or '100' crystal plane normal
                      aligned with the magnetic field

Outputs

    sys   - Spinach system specification structure

    inter - Spinach interaction specification structure

Notes

The principal values used are g=[2.3463 1.8438 1.7045] with a 29 degree tilt for the O4 centre, and g=[2.3277 1.7982 1.7149] with a 28 degree tilt for the NLO2 centre; the corresponding 59Co hyperfine principal values are [8.86 6.43 5.82] mT and [8.24 6.57 5.76] mT.

See also

diamond_gev0.m, diamond_n2vm.m, diamond_nvm_gs.m, diamond_p1.m, rotmat_align.m, Import,_export,_and_visualisation

Version 2.13, authors: Alexey Bogdanov