期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 117, 期 13, 页码 7090-7094出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1920502117
关键词
electronic phase separation; manganites; tricolor superlattice; chemical ordering
资金
- National Key Research and Development Program of China [2016YFA0300702]
- National Basic Research Program of China (973 Program) [2014CB921104]
- National Natural Science Foundation of China [11991060]
- Shanghai Municipal Natural Science Foundation [18JC1411400, 18ZR1403200, 17ZR1442400, 17ZR1442600]
- Program of Shanghai Academic Research Leader [18XD1400600]
- China Postdoctoral Science Foundation [2017M610221, KLH1512080, KLH1512089, 2016M601488, 2017T100265]
- Shanghai Sailing Program [17YF1429000]
- National Postdoctoral Program for Innovative Talents
- US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division
- Australian Research Council's Linkage Infrastructure, Equipment and Facilities Grant [LE0454166]
Electronic phase separation in complex oxides is the inhomogeneous spatial distribution of electronic phases, involving length scales much larger than those of structural defects or nonuniform distribution of chemical dopants. While experimental efforts focused on phase separation and established its correlation with nonlinear responses under external stimuli, it remains controversial whether phase separation requires quenched disorder for its realization. Early theory predicted that if perfectly clean samples could be grown, both phase separation and nonlinearities would be replaced by a bicritical-like phase diagram. Here, using a layer-by-layer superlattice growth technique we fabricate a fully chemically ordered tricolor manganite superlattice, and compare its properties with those of isovalent alloyed manganite films. Remarkably, the fully ordered manganite does not exhibit phase separation, while its presence is pronounced in the alloy. This suggests that chemical-dopingi-nduced disorder is crucial to stabilize the potentially useful nonlinear responses of manganites, as theory predicted.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据