Tweed in martensites: a potential new spin glass

@article{Sethna1992TweedIM,
  title={Tweed in martensites: a potential new spin glass},
  author={James P. Sethna and Sivan Kartha and Teresa Cast'an and James A. Krumhansl},
  journal={Physica Scripta},
  year={1992},
  volume={42},
  pages={214-219}
}
We've been studying the "tweed" precursors above the martensitic transition in shape-memory alloys. These characteristic cross-hatched modulations occur for hundreds of degrees above the first-order shape-changing transition. Our two-dimensional model for this transition, in the limit of infinite elastic anisotropy, can be mapped onto a spin-glass Hamiltonian in a random field. We suggest that the tweed precursors are a direct analogy of the spin-glass phase. The tweed is intermediate between… 
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