TY - JOUR

T1 - Cooperative effects of electron correlation and charge ordering on the metal-insulator transition in quasi-one-dimensional deuteratedCu

AU - Takahashi, T.

AU - Yokoya, T.

AU - Chainani, A.

AU - Kumigashira, H.

AU - Akaki, O.

AU - Kato, R.

PY - 1996

Y1 - 1996

N2 - We study the changes in the electronic structure of a quasi-one-dimensional organic conductor, deuterated (Formula presented)Cu, across the CDW/M-I (charge-density-wave/metal-insulator) transition at (Formula presented) K, using temperature-dependent (30-300 K) high-resolution photoemission spectroscopy. Above the mean-field (MF) transition temperature ((Formula presented)), the system shows typical metallic behavior with small but finite density of states at (Formula presented). The spectral weight in the vicinity of (Formula presented) decreases systematically upon decreasing temperature below (Formula presented) even in the metallic phase, resulting in a pseudogap formation above (Formula presented). This behavior continues across (Formula presented) and causes the M-I transition. The spectral weight is transferred to energies much larger than the gap, indicating a cooperative effect of strong electron correlation and structural changes which imply decreases in interchain coupling across the M-I transition.

AB - We study the changes in the electronic structure of a quasi-one-dimensional organic conductor, deuterated (Formula presented)Cu, across the CDW/M-I (charge-density-wave/metal-insulator) transition at (Formula presented) K, using temperature-dependent (30-300 K) high-resolution photoemission spectroscopy. Above the mean-field (MF) transition temperature ((Formula presented)), the system shows typical metallic behavior with small but finite density of states at (Formula presented). The spectral weight in the vicinity of (Formula presented) decreases systematically upon decreasing temperature below (Formula presented) even in the metallic phase, resulting in a pseudogap formation above (Formula presented). This behavior continues across (Formula presented) and causes the M-I transition. The spectral weight is transferred to energies much larger than the gap, indicating a cooperative effect of strong electron correlation and structural changes which imply decreases in interchain coupling across the M-I transition.

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U2 - 10.1103/PhysRevB.53.1790

DO - 10.1103/PhysRevB.53.1790

M3 - Article

AN - SCOPUS:0000829796

SN - 1098-0121

VL - 53

SP - 1790

EP - 1794

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 4

ER -