Creation and control of charge cluster glass phases

电荷序是在强关联电子系统中实现的一种电子相，它是由格位间库仑排斥作用驱动的。因此，取决于各向异性的网站间库仑排斥，导电电子有规律地本地化与不同的模式。它们中的一些将竞争和共存，以显示由电荷有序域组成的玻璃状图案。首席研究员称之为“电荷团簇玻璃”，并试图创造和控制这种新的电子相。结果表明：（1）在快速冷却的θ-（BEDT-TTF）_2RbZn（SCN）_4玻璃相的非线性导电是受控的;（2）在κ-（BEDT-TTF）2Cu 2（CN）3，其归因于不同反铁电畴的团簇玻璃相，（3）在β-（meso-DMBEDT-TTF）_2PF_6中发现了一种新的团簇玻璃相，它由二聚体Mott绝缘相和电荷有序相组成。通过这些发现，首席研究员澄清了本研究中发现的簇玻璃相具有共同的一般特征，作为强相关电子系统中的竞争有序态。

Charge order is a kind of electronic phase that is realized in strongly correlated electron systems, which is driven by the inter-site Coulomb repulsion. Thus depending on the anisotropy of the inter-site Coulomb repulsion, conduction electrons are regularly localized with different patterns. Some of them will compete and coexist to show a glass-like pattern consisting of charge-ordered domains. The principal investigator calls this“charge cluster glass", and have tried to create and control this new electron phase. Some of the results highlights(1) a charge cluster glass is created in rapidly-cooledθ-(BEDT-TTF) 2RbZn(SCN) 4, and the nonlinear conduction in this glass phase is controlled,(2) anomalous dielectric relaxation is discovered inκ-(BEDT-TTF) 2Cu2(CN) 3, which is ascribed to a cluster glass phase of different antiferroelectric domains,(3) a new type of cluster glass phase is discovered inβ-(meso-DMBEDT-TTF) 2PF6, which is composed of dimmer Mott insulator phase and charge ordered phase. Through these findings, the principal investigator has clarified that the cluster glass phases discovered in this research share generic features in common as a competing ordered state in strongly correlated electron systems.