Open AccessThe study on the Peierls phase transition of TTF-TCNQ
Author(s) -
Zhang Hong-Qun,
Shaojun Liu,
Rongwu Li
Publication year - 2005
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.54.3317
Subject(s) - peierls transition , condensed matter physics , conductor , phase transition , materials science , phase (matter) , metal–insulator transition , phonon , metal , physics , quantum mechanics , metallurgy , composite material
According to Peierls phase transition theory on the basis of the electron-phonon interaction, the Peierls phase transition temperature of a one-dimensional organic conductor TTF-TCNQ is computed by using the deformation potential model with the data calculated by using a semi-empirical crystal orbital method. The result indicates that the Peierls phase transition temperature of TTF chains is lower than that of TCNQ chains, which demonstrate that the electron-phonon coupling interaction in TTF chains is weaker than that in TCNQ chains, and the metal-insulator phase transition in TTF-TCNQ at 54K mainly takes place in TCNQ chains.