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Correlation gap in the optical spectra of the two-dimensional organic metal (BEDT-TTF)_4[Ni(dto)_2] | | P. Haas
; E. Griesshaber
; B. Gorshunov
; D. Schweitzer
; M. Dressel
; F.F. Assaad
; | | Date: |
23 Jun 2000 | | Journal: | Physical Review B - Rapid Communication {f 62}, 14673 (2000) | | Subject: | cond-mat | | Affiliation: | U Stuttgart | | Abstract: | Optical reflection measurements within the highly conducting (a,b)-plane of the organic metal (BEDT-TTF)_4[Ni(dto)_2] reveal the gradual development of a sharp feature at around 200 cm as the temperature is reduced below 150 K. Below this frequency a narrow Drude-like response is observed which accounts for the metallic behavior. Since de Haas-von Alphen oscillations at low temperatures confirm band structure calculations of bands crossing the Fermi energy, we assign the observed behavior to a two-dimensional metallic state in the proximity of a correlation induced metal-insulator transition. | | Source: | arXiv, cond-mat/0006358 | | Services: | Forum | Review | PDF | Favorites | |
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