Using general arguments borrowed from magnetism, the author shows that it is short-range order parameter fluctuations close to Tc that lead to the observed behaviour of chi at a Peierls transition; in the quasi-static approximation dchi/dT should vary as the lattice specific heat. The addition of impurities produces rounding of the d chi /dT cusp when the true phase transition is destroyed by disorder. The theory compares favourably with experiment.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics