2004/08/31 by T. Sasaki, N. Yoneyama, A. Suzuki +7
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetism in coordination complexes #Organic and Molecular Conductors Research #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1143/jpsj.74.2351
published as J. Phys. Soc. Jpn. 74, 2351 (2005) · 10 pages, 8 figures
arxiv created 2005/03/28 · openalex publication_date 2005/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Systematic investigation of the electronic phase separation on macroscopic scale is reported in the organic Mott system κ-(BEDT-TTF)2Cu[N(CN)2]Br. Real space imaging of the phase separation is obtained by means of scanning micro-region infrared spectroscopy using the synchrotron radiation. The phase separation appears near the Mott boundary and changes its metal-insulator fraction with the substitution ratio x in κ-[(h-BEDT-TTF)1-x(d-BEDT-TTF)x]2Cu[N(CN)2]Br, of which band width is controlled by the substitution ratio x between the hydrogenated BEDT-TTF molecule (h-BEDT-TTF) and the deuterated one (d-BEDT-TTF). The phase separation phenomenon observed in this class of organics is considered on the basis of the strongly correlated electronic phase diagram with the first order Mott transition.