Competition electronic states of (TMTTF)2MF6: ESR investigations

Abstract

ESR measurements were performed to investigate the low-temperature electronic states of (TMTTF) 2 MF 6 (M = P, As, Sb and their mixed alloys). The temperature dependence of the ESR linewidth, ΔH pp , of AsF 6 does not change its anisotropy at around T sp . On the other hand, PF 6 and some P-AsF 6 alloys show changes of the ΔH pp anisotropy at around T sp , suggesting reconstruction of electronic charges. We propose the possible charge ordering configuration in the vicinity of the low temperature ground states from the ESR point of view.