Kitaev materials

IF 23.9 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Physics Reports Pub Date : 2022-03-04 DOI:10.1016/j.physrep.2021.11.003

Simon Trebst, Ciarán Hickey

引用次数: 168

Abstract

In transition-metal compounds with partially filled 4 $d$ and 5 $d$ shells spin–orbit entanglement, electronic correlations, and crystal-field effects conspire to give rise to a variety of novel forms of topological quantum matter. This includes Kitaev materials — a family of spin–orbit assisted Mott insulators, in which local, spin–orbit entangled $j = 1 / 2$ moments form that are subject to dominant bond-directional Ising exchange interactions. On a conceptual level, Kitaev materials attract much interest for their potential for unconventional forms of magnetism, such as spin liquid physics in two- and three-dimensional lattice geometries or the formation of non-trivial spin textures. Experimentally, a number of Kitaev materials have been synthesized, which includes the honeycomb materials Na $_{2}$ IrO $_{3}$ , $α$ -Li $_{2}$ IrO $_{3}$ , H $_{3}$ LiIr $_{2}$ O $_{6}$ , and, most prominently, $α$ -RuCl $_{3}$ , the triangular materials Ba $_{3}$ Ir $_{x}$ Ti $_{3 - x}$ O $_{9}$ , as well as the three-dimensional hyper-honeycomb and stripy-honeycomb materials $β$ -Li $_{2}$ IrO $_{3}$ and $γ$ -Li $_{2}$ IrO $_{3}$ . We provide a short review of the current status of the theoretical and experimental exploration of these Kitaev materials.

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Kitaev材料

在具有部分填充的4d和5d壳层的过渡金属化合物中，自旋轨道纠缠、电子相关和晶体场效应共同产生了各种新颖形式的拓扑量子物质。这包括Kitaev材料——一种自旋轨道辅助莫特绝缘体，其中局部自旋轨道纠缠的j=1/2力矩形成，受主要键定向Ising交换相互作用的影响。在概念层面上，基塔耶夫材料吸引了很多人的兴趣，因为它们具有非传统形式的磁性，例如二维和三维晶格几何中的自旋液体物理或非平凡自旋纹理的形成。在实验上，已经合成了许多Kitaev材料，其中包括蜂窝材料Na2IrO3、α-Li2IrO3、H3LiIr2O6，最突出的是α-RuCl3，三角形材料Ba3IrxTi3−xO9，以及三维超蜂窝和条状蜂窝材料β-Li2IrO3和γ-Li2IrO3。我们对这些基塔耶夫材料的理论和实验研究现状进行了简要的综述。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physics Reports 物理-物理：综合

CiteScore

56.10

自引率

0.70%

发文量

102

审稿时长

9.1 weeks

期刊介绍： Physics Reports keeps the active physicist up-to-date on developments in a wide range of topics by publishing timely reviews which are more extensive than just literature surveys but normally less than a full monograph. Each report deals with one specific subject and is generally published in a separate volume. These reviews are specialist in nature but contain enough introductory material to make the main points intelligible to a non-specialist. The reader will not only be able to distinguish important developments and trends in physics but will also find a sufficient number of references to the original literature.