论文标题

轨道物理:光荣的过去,光明的未来

Orbital physics: glorious past, bright future

论文作者

Khomskii, D. I.

论文摘要

过渡金属(TM)化合物呈现出非常大的材料,具有相当多样化的特性。其中有一个绝缘子,金属,具有绝缘子金属过渡的系统;大多数磁性系统是TM化合物;其中还有(高-TC)超导体。它们非常丰富的特性在很大程度上取决于不同程度的自由度的强烈相互作用:电荷;旋转;轨道格子。轨道效应在这些系统中起着非常重要的作用 - 不仅在它们中!大约70年前,Goodenough发起的该领域的研究结果非常富有成果,并产生了许多重要的结果。在这篇简短的评论中,我首先讨论了轨道物理学的基础知识,总结了这个大领域的主要成就,在这个大领域中,Goodenough发挥了关键作用,如今已被广泛用来解释TM化合物的许多特性。在文本的主要部分中,我讨论了轨道物理学中的新颖发展和观点,这仍然是一个非常活跃的研究领域,不断产生新的惊喜。

Transition metal (TM) compounds present a very big class of materials with quite diverse properties. There are among them insulators, metals, systems with insulator-metal transitions; most magnetic systems are TM compounds; there are among them also (high-Tc) superconductors. Their very rich properties are largely determined by the strong interplay of different degrees of freedom: charge; spin; orbital; lattice. Orbital effects play a very important role in these systems -- and not only in them! The study of this field, initiated by Goodenough almost 70 years ago, turned out to be very fruitful and produced a lot of important results. In this short review I first discuss the basics of orbital physics, summarize the main achievements in this big field, in which Goodenough played a pivotal role and which are nowadays widely used to explain many properties of TM compounds. In the main part of the text I discuss novel developments and perspectives in orbital physics, which is still a very active field of research, constantly producing new surprises.

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