Phase transition in the spin-Peierls compound TiOCl towards an incommensurate phase
What is it about?
A temperature-independent c-axis unique monoclinic distortion of the crystal lattice within the incommensurate phase between Tc1=67 K and Tc2=90 K is discussed. The first-order phase transition at Tc2 driven by the formation of antiferromagnetic order on the Ti-O bilayers is governed by the monoclinic lattice distortion.
Why is it important?
The temperature-dependent incommensurate modulation represents the growth of the number of spin-Peierls-type singlet pairs on cooling. At Tc1 then the crystal transforms into the spin-Peierls state.
The following have contributed to this page: Priv.-Doz. Dr. Andreas Schönleber