Axion optical induction of antiferromagnetic order
Axion optical induction of antiferromagnetic order
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DOI：
10.1038/s41563-023-01493-5
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发表时间：
2023-03
期刊：
影响因子：
41.2
通讯作者：
Jian-Xiang Qiu;C. Tzschaschel;J. Ahn;Anyuan Gao;Houchen Li;Xin-Yue Zhang;B. Ghosh;Chaowei Hu;Yu-Xuan Wang;Yu-Fei Liu;Damien Bérubé;T. Dinh;Zhenhao Gong;S. Lien;Sheng-Chin Ho;Bahadur Singh;Kenji Watanabe;T. Taniguchi;D. Bell;Hai-Zhou Lu;A. Bansil;Hsin Lin;Tay-Rong Chang;B. Zhou;Qiong Ma;A. Vishwanath;Ni Ni-Ni;Su-Yang Xu
中科院分区：
文献类型：
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作者：
Jian-Xiang Qiu;C. Tzschaschel;J. Ahn;Anyuan Gao;Houchen Li;Xin-Yue Zhang;B. Ghosh;Chaowei Hu;Yu-Xuan Wang;Yu-Fei Liu;Damien Bérubé;T. Dinh;Zhenhao Gong;S. Lien;Sheng-Chin Ho;Bahadur Singh;Kenji Watanabe;T. Taniguchi;D. Bell;Hai-Zhou Lu;A. Bansil;Hsin Lin;Tay-Rong Chang;B. Zhou;Qiong Ma;A. Vishwanath;Ni Ni-Ni;Su-Yang Xu
利用圆偏振光控制量子物质是物理学、化学和生物学中一个非常有趣的课题。以前的研究已经证明了依赖于螺旋度的手性和磁化的光学控制，在化学不对称合成、生物分子的同手性和铁磁自旋电子学中具有重要的意义。我们报道了在二维偶数层MnBi2Te4中对完全补偿的反铁磁序的螺旋度相关的光学控制的令人惊讶的观察结果。为了理解这种控制，我们研究了一种反铁磁圆二向色性，它只在反射中出现，在传输中不出现。我们发现光学控制和圆二向色性都是由光学轴子电动力学引起的。我们的轴子感应提供了光学控制一类非对称反铁磁体(反转，时间反转)的可能性，如Cr2O_3，偶层CrI_3，以及可能的铜酸盐中的伪能隙状态。在MnBi2Te4中，这进一步为由拓扑边缘状态形成的无耗散电路的光学写入打开了大门。
Using circularly polarized light to control quantum matter is a highly intriguing topic in physics, chemistry and biology. Previous studies have demonstrated helicity-dependent optical control of chirality and magnetization, with important implications in asymmetric synthesis in chemistry; homochirality in biomolecules; and ferromagnetic spintronics. We report the surprising observation of helicity-dependent optical control of fully compensated antiferromagnetic order in two-dimensional even-layered MnBi2Te4, a topological axion insulator with neither chirality nor magnetization. To understand this control, we study an antiferromagnetic circular dichroism, which appears only in reflection but is absent in transmission. We show that the optical control and circular dichroism both arise from the optical axion electrodynamics. Our axion induction provides the possibility to optically control a family of-symmetric antiferromagnets (, inversion;, time-reversal) such as Cr2O3, even-layered CrI3and possibly the pseudo-gap state in cuprates. In MnBi2Te4, this further opens the door for optical writing of a dissipationless circuit formed by topological edge states.