Study of the charge-transfer salts with inhomogeneous electronic structure focusing on a charge-order system

研究了由M_2^+X^-组成的电荷有序体系的非均匀电子态。(1)在较宽的转变温度范围内，我们发现了高低温相的非均匀共存相。(2)在电子相图的高压区和低温区，我们在超导相附近发现了一个非均匀共存相。(3)用干涉法结合倍频显微镜观察了电子铁电体的铁电畴。(4)我们证明了电荷有序相附近的高电导态不是金属的，而是动态局域的。

We have investigated the inhomogeneous electronic states of charge-ordered system which consists of M_2^+X^- composition. (1) We found an inhomogeneous coexistence phase of high- and low-temperature phases in a wide transition-temperature region. (2) We found an inhomogeneous coexistence phase near the superconducting phase in high-pressure and low-temperature region of electronic phase diagram. (3) Ferroelectric domains of electron ferroelectrics were observed using the interference method combined with SHG microscope. (4) We have shown that the high-conductivity state near a charge-ordered phase is not metallic but dynamically localized.