Kareev Mikhail, Liu Xiaoran, Terilli Michael, Wen Fangdi, Wu Tsung-Chi, Doughty Dorothy, Li Hongze, Zhou Jianshi, Zhang Qinghua, Gu Lin, Chakhalian Jak
Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, United States.
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
Nano Lett. 2025 Jan 22;25(3):966-972. doi: 10.1021/acs.nanolett.4c03969. Epub 2025 Jan 2.
Pyrochlore materials are known for their exotic magnetic and topological phases arising from complex interactions among electron correlations, band topology, and geometric frustration. Interfaces between different pyrochlore crystals characterized by complex many-body ground states hold immense potential for novel interfacial phenomena due to the strong interactions between these phases. However, the realization of such interfaces has been severely hindered by limitations in material synthesis methods. In this study, we discover a robust synthesis method that produces the previously unexplored epitaxial pyrochlore interface between spin ice DyTiO and Weyl semimetal EuIrO. The method relies on an ultrahigh supersaturation regime during deposition aided by directional IR-laser-driven thermal gradients, transforming amorphous covalent networks into nearly perfectly ordered, atomically sharp interfaces with a chemically ideal arrangement of ions. The novel pyrochlore interface enables the study of interactions between relativistic Weyl fermions and spin ice magnetic monopoles, opening a path to designing diverse pyrochlore interfaces.
烧绿石材料因其电子关联、能带拓扑和几何阻挫之间复杂相互作用所产生的奇异磁相和拓扑相而闻名。具有复杂多体基态特征的不同烧绿石晶体之间的界面，由于这些相之间的强相互作用，具有产生新型界面现象的巨大潜力。然而，材料合成方法的局限性严重阻碍了此类界面的实现。在本研究中，我们发现了一种稳健的合成方法，该方法能制备出自旋冰DyTiO和外尔半金属EuIrO之间此前未被探索的外延烧绿石界面。该方法依赖于沉积过程中的超高过饱和状态，并借助定向红外激光驱动的热梯度，将无定形共价网络转变为具有近乎完美有序、原子级锐利且离子化学理想排列的界面。这种新型烧绿石界面使得研究相对论性外尔费米子与自旋冰磁单极子之间的相互作用成为可能，为设计多样的烧绿石界面开辟了一条道路。
