表面化学调控无机固体相变与智能应用

Surface chemical-modification of inorganic solids for engineering the phase transitions and smart applications

低维无机固体材料中电子-电子关联作用导致了许多新奇的相变行为,如金属-绝缘体转变、超导、电荷密度波和巨磁阻效应等.外场调节参量可以改变有序相间的平衡关系,实现不同相之间的转变,诱导新的物理内容甚至全新的量子临界现象,具有巨大的潜力应用于未来先进电子元件和智能响应器件.低维无机相变固体具有极大的比表面积和电子关联性,表面化学修饰为调控其相变和复杂相互作用打开了新的研究空间,有助于低维关联电子体系物理规律和新量子序的探索,对理解这些复杂物理现象的微观起源具有重要意义.本文概述了近年来发展的表面化学修饰策略调控低维无机固体相变的系列进展,并以此探究维度受限下相变固体对外界光和磁等的智能响应特性.

The electron-electron correlation in low-dimensional inorganic solid materials leads to many novel phase transition behaviors, such as metal-insulator transition, superconductivity, charge density wave and giant magnetoresistance effect, etc. Adjusting parameters by external fields can change the equilibrium relationship between ordered phases, realize the phase transition between different competing phases, and induce new physical properties and even new quantum critical phenomena. These phase-transition materials have great potential to be used in advanced electronic components and smart response devices in the future. It is known that low-dimensional inorganic phase- transition solids have large specific surface area and electronic correlation effects. Surface chemical modification opens up a new research space for the regulation of their phase transitions and complex interactions, which is not only helpful to explore physical laws and new quantum orders of low-dimensional correlated electron systems, but also of great significance to understand the microscopic origin of these complex physical phenomena. In this review, we focus on a series of recent advances about the regulation of phase transitions of low-dimensional inorganic solids by surface chemical modification strategies, and investigate their smart response to external light and magnetism under the limited dimension.