type: dislotwin

references:
  - N. Jia et al.,
    Acta Materialia 60(3):1099-1115, 2012,
    https://doi.org/10.1016/j.actamat.2011.10.047
  - N. Jia et al.,
    Acta Materialia 60:3415-3434, 2012,
    https://doi.org/10.1016/j.actamat.2012.03.005

gamma_0_sb: 0.0001
tau_sb: 180.0e6 # tau_hat_sb
Q_sb: 4.0e-19 # Q_0
p_sb: 1.15
q_sb: 1.0