Abstract
A description is given of the present status of studies on the Peierls transition, which is a metal-insulator transition characteristic of an electronically one-dimensional system. Fundamental properties of a one-dimensional electron system are discussed and the concept of charge-density wave is explained. Physical properties of TTF-TCNQ and its family (TSeF-TCNQ, HMTTF-TCNQ, HMTSF-TCNQ, TMTSF-DMTCNQ and NMP-TCNQ) are described in relation to the Peierls transition, and brief descriptions are given of other one-dimensional conductors, MX3 (M=Ta, Nb; X=S, Se) and K2Pt(CN)4Br0.3·3H2O.
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