Metal-insulator transition in the dimerized organic conductor κ-(BEDT-TTF)2Hg(SCN)2Br (CROSBI ID 241867)
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Podaci o odgovornosti
Ivek, Tomislav ; Beyer, Rebecca ; Badalov, Sabuhi ; Čulo, Matija ; Tomić, Silvia ; Schlueter, John. A. ; Zhilyaeva, Elena I. ; Lyubovskaya, Rimma N. ; Dressel, Martin
engleski
Metal-insulator transition in the dimerized organic conductor κ-(BEDT-TTF)2Hg(SCN)2Br
The organic charge-transfer salt κ-(BEDT-TTF)2Hg(SCN)2Br is a quasi-two-dimensional metal with a half-filled conduction band at ambient conditions. When cooled below T = 80 K, it undergoes a pronounced transition to an insulating phase where the resistivity increases many orders of magnitude. In order to elucidate the nature of this metal-insulator transition, we have performed comprehensive transport, dielectric and optical investigations. The findings are compared with other dimerized κ-(BEDT-TTF) salts, in particular the Cl analog, where a charge-order transition takes place at TCO = 30 K.
charge order ; conductivity ; dielectric properties ; metal-insulator transition ; optical conductivity ; permittivity ; Mott insulator ; dielectric spectroscopy ; Fourier transform infrared spectroscopy ; infrared spectroscopy
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