Department of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States.
Chem Rev. 2021 Feb 10;121(3):1463-1512. doi: 10.1021/acs.chemrev.0c00718. Epub 2020 Dec 22.
In a generalization of the latest achievements in this field, and as a pattern of massive applications, we present here the Jahn-Teller effect (JTE) and pseudo-JTE (PJTE) as general tools in the study of physical and chemical phenomena related to structural properties of polyatomic systems. We show that the JTE and PJTE are no more specific features of particular (rare) systems (as it was assumed earlier), but virtual properties of all molecular and solid state formations. They occur as a result of vibronic coupling that compensates for the error (inadequacy) introduced in semi-classical definitions of polyatomic configurations by their high-symmetry nuclear positions, thus appending the basic understanding of related phenomena with a new dimension. The implications of the JTE and PJTE in observable properties varies significantly, being especially strong in the states of electronic degeneracy or pseudodegeneracy, but they cannot be a priory fully excluded for any system. After the introductory sections we demonstrate some of the more recent results of the influence of these effects on the observables in physical and chemical phenomena, together with a wide range of applications. The latter are conventionally separated in three parts: intermediate states in chemical and photochemical reactions, manipulation of structural properties of polyatomic systems targeting the JTE and PJTE, and applications in materials science. The illustrative examples include the origin of sudden polarization in photochemical reactions, methods of planarization of puckered (buckled) two-dimensional systems, modification of crystal sublattices by targeting the JTE parameters, the defining role of JTE and PJTE in electronics and spintronics, the origin of ferroelectricity and multiferroicity, as well as a novel property of solids, orientational polarization, and its applications.
在该领域最新成果的推广中，作为大规模应用的范例，我们在这里介绍 Jahn-Teller 效应（JTE）和伪 Jahn-Teller 效应（PJTE），作为研究与多原子体系结构性质相关的物理和化学现象的通用工具。我们表明，JTE 和 PJTE 不再是特定（稀有）体系的特有特征（如以前所假设的），而是所有分子和固态形成的虚拟特性。它们是由于振子耦合而产生的，这种耦合补偿了高对称核位置对半经典多原子构型定义所引入的误差（不充分），从而为相关现象的基本理解增添了新的维度。JTE 和 PJTE 对可观察性质的影响差异很大，在电子简并或伪简并状态下尤其强烈，但不能事先完全排除任何体系的影响。在介绍性章节之后，我们展示了这些效应对物理和化学现象中可观察性质的影响的一些最新结果，以及广泛的应用。后者通常分为三部分：化学和光化学反应中的中间态，针对 JTE 和 PJTE 操纵多原子体系的结构性质，以及材料科学中的应用。说明性示例包括光化学反应中突然极化的起源、平面化褶皱（弯曲）二维体系的方法、通过针对 JTE 参数来修饰晶体亚晶格、JTE 和 PJTE 在电子学和自旋电子学中的定义作用、铁电性和多铁性的起源，以及固体的一种新特性，即取向极化及其应用。
