标题： 在反铁磁绝缘态的LaMnO3/PrMnO3/CaMnO3三色超晶格中的电子相分离纳米网络 显示英文标题

标题： Electronically phase separated nano-network in antiferromagnetic insulating LaMnO3/PrMnO3/CaMnO3 tricolor superlattice

摘要： 强关联材料通常表现出电子相分离（EPS）现象，其域图案具有随机性。在微观尺度上控制电子相的空间排列对于定制其宏观性质和/或设计新型电子器件是非常理想的。在这里，我们报告了在SrTiO3（STO）(001)基底上生长的单原子层堆叠的LaMnO3/CaMnO3/PrMnO3超晶格中EPS纳米网络的形成，该基底已知具有反铁磁（AFM）绝缘基态。EPS纳米网络是由于在低温下底层STO基底的结构域形成引发的内部应变松弛的结果。在温度循环后可以重复相同的纳米尺度网络图案，使我们能够采用不同的局部成像技术直接比较单个EPS域的磁性和输运状态。我们的结果证实了在锰氧化物中铁磁（AFM）到金属（绝缘）状态的一一对应关系。这也标志着从被动表征强关联系统中的EPS向主动操控其行为的范式转变的重要一步。 显示英文摘要

摘要： Strongly correlated materials often exhibit an electronic phase separation (EPS) phenomena whose domain pattern is random in nature. The ability to control the spatial arrangement of the electronic phases at microscopic scales is highly desirable for tailoring their macroscopic properties and/or designing novel electronic devices. Here we report the formation of EPS nanoscale network in a mono-atomically stacked LaMnO3/CaMnO3/PrMnO3 superlattice grown on SrTiO3 (STO) (001) substrate, which is known to have an antiferromagnetic (AFM) insulating ground state. The EPS nano-network is a consequence of an internal strain relaxation triggered by the structural domain formation of the underlying STO substrate at low temperatures. The same nanoscale network pattern can be reproduced upon temperature cycling allowing us to employ different local imaging techniques to directly compare the magnetic and transport state of a single EPS domain. Our results confirm the one-to-one correspondence between ferromagnetic (AFM) to metallic (insulating) state in manganite. It also represents a significant step in a paradigm shift from passively characterizing EPS in strongly correlated systems to actively engaging in its manipulation.