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Spectroscopic studies of charge‐ordering system in organic conductors
Author(s) -
Yakushi K.,
Yamamoto K.,
Świetlik R.,
Wojciechowski R.,
Suzuki K.,
Kawamoto T.,
Mori T.,
Misaki Y.,
Tanaka K.
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200450815
Subject(s) - tetrathiafulvalene , charge ordering , raman spectroscopy , electrical resistivity and conductivity , charge (physics) , electrical conductor , chemistry , condensed matter physics , phase (matter) , materials science , infrared , analytical chemistry (journal) , molecule , physics , organic chemistry , optics , quantum mechanics , composite material
Charge localization generates a non‐uniform charge distribution in some organic conductors. Phase transitions accompanying such a localization of charge are studied by using infrared and Raman spectroscopy. We first introduce θ‐(BEDT‐TTF) 2 MM′(SCN) 4 (M=Rb, Cs, Tl; M′=Zn, Co) as typical examples of a charge‐ordering system, where BEDT‐TTF is bis(ethylenedithio)tetrathiafulvalene. We apply the same spectroscopic technique to α′‐(BEDT‐TTF) 2 IBr 2 , θ‐(BDT‐TTF) 2 Cu(NCS) 2 , and (TTM‐TTP)I 3 , which show the phase transitions from low‐resistivity to high‐resistivity state, where TTM‐TTP is 2,5‐bis[4,5‐bis(methylsulfonyl)‐1,3‐dithiol‐2‐ylidene]‐1,3,4,6‐tetrathiapentalene.