TY - JOUR
T1 - Real space imaging of the metal-insulator phase separation in the band width controlled organic Mott system κ-(BEDT-TTF)2Cu[N(CN) 2]Br
AU - Sasaki, T.
AU - Yoneyama, N.
AU - Suzuki, A.
AU - Kobayashi, N.
AU - Ikemoto, Y.
AU - Kimura, H.
PY - 2005/8
Y1 - 2005/8
N2 - 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.
AB - 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.
KW - κ-(BEDT-TTF)Cu[N(CN)]Br
KW - Infrared reflectance spectra
KW - Mott transition
KW - Organic superconductor
KW - Phase separation
KW - Synchrotron radiation
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U2 - 10.1143/JPSJ.74.2351
DO - 10.1143/JPSJ.74.2351
M3 - Article
AN - SCOPUS:24644499938
SN - 0031-9015
VL - 74
SP - 2351
EP - 2360
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 8
ER -