All-in-all-out magnetic domain wall conduction in a pyrochlore iridate heterointerface
All-in-all-out magnetic domain wall conduction in a pyrochlore iridate heterointerface
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DOI：
10.1103/physrevb.93.064419
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发表时间：
2016-02-17
影响因子：
3.7
通讯作者：
Kawasaki, M.
中科院分区：
文献类型：
--
作者：
Fujita, T. C.;Uchida, M.;Kawasaki, M.
烧绿石氧化物具有“全进全出”的自旋有序性，作为一种丰富的突现态材料，引起了人们的极大兴趣。这种有序有两种不同类型的磁畴（全入-全出或全出-全入），具有破缺的时间反转对称性，并且理论上已经证明在它们的畴壁处出现了非平凡的金属表面态。在这里，我们报告在两个烧绿石铱酸盐的异质界面处形成的单个全进全出/全出全进磁畴壁处观察到这种金属传导。通过利用它们与不同镧系离子的不同磁响应，畴壁可控地插入在异质界面处，表面状态被检测为具有铁电滞后的异常导电增强。我们的建立为进一步调查和操纵这种新型的地面运输铺平了道路。
Pyrochlore oxides possessing "all-in-all-out" spin ordering have attracted burgeoning interest as a rich ground of emergent states. This ordering has two distinct types of magnetic domains (all-in-all-out or all-out-all-in) with broken time-reversal symmetry, and a nontrivial metallic surface state has been theoretically demonstrated to appear at their domain wall. Here, we report on the observation of this metallic conduction at the single all-in-all-out/all-out-all-in magnetic domain wall formed at the heterointerface of two pyrochlore iridates. By utilizing the different magnetoresponses of them with different lanthanide ions, the domain wall is controllably inserted at the heterointerface, the surface state being detected as an anomalous conduction enhancement with a ferroic hysteresis. Our establishment paves the way for further investigation and manipulation of this new type of surface transport.