Peculiarties of the electronic and electron vibrational spectra of organic conductors: BEDT-TTF salts of alpha-type structure

✍ Scribed by M. G. Kaplunov; N. D. Kushch; R. N. Lyubovskaya

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 371 KB
• Volume: 7
• Category: Article
• ISSN: 1616-301X
• DOI: 10.1002/(sici)1099-0712(199703)7:2<79::aid-amo264>3.0.co;2-5

✦ Synopsis

Polarised infrared reflectivity spectra of some ET-based conducting salts of alpha-type structure are measured and compared: (ET) 2 I 3 (I), (ET) 2 TlHg(XCN) 4 (X ¤ S,Se) (II) and (ET) 8 [Hg 4 Br 12 (CH 3 C 6 H 4 Cl) 2 ] (III). For both I and II the electronic reflectivity is greater for the polarisation perpendicular to ET stacks. However, a resolved electron vibrational band in the region of 1 100 -1 400 cm -1 is observed for II in the polarisation characterised by lower electronic reflectivity in contrast with the spectra of I. Another difference between I and II is the absence of the pronounced plasma edge in the region of 4 000 cm -1 in the spectra of II, which may be due to high electron damping. For III the electronic reflectivity is low and no resolved electron vibrational band in the region of 1 100-1 400 cm -1 is observed. The peculiarities of the electron-vibrational spectra of I, II and III may be due to the details of the crystal structure.