## spin-Peierls transition

https://doi.org/10.1351/goldbook.S05873
A magneto-elastic transition that occurs in quasi one-dimensional antiferromagnetic materials when the magnetic @F02515@ decrease due to the formation of singlet spin pairs outweighs the increase in lattice @F02515@ occurring as a result of the @D01744@ of the regular array. Example: The transition in tetrathiafulvalenium bis(dithiolene)cuprate at $$12\ \text{K}$$.
Source:
PAC, 1994, 66, 577. (Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)) on page 591 [Terms] [Paper]