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Title: Direct observation of electronic-liquid-crystal phase transitions and their microscopic origin in La1/3Ca2/3MnO3
Authors: Tao, J
Sun, K
Yin, W.-G
Wu, L
Xin, H
Wen, J.G
Luo, W
Pennycook, S.J 
Tranquada, J.M
Zhu, Y
Issue Date: 2016
Publisher: Nature Publishing Group
Citation: Tao, J, Sun, K, Yin, W.-G, Wu, L, Xin, H, Wen, J.G, Luo, W, Pennycook, S.J, Tranquada, J.M, Zhu, Y (2016). Direct observation of electronic-liquid-crystal phase transitions and their microscopic origin in La1/3Ca2/3MnO3. Scientific Reports 6 : 37624. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: The ground-state electronic order in doped manganites is frequently associated with a lattice modulation, contributing to their many interesting properties. However, measuring the thermal evolution of the lattice superstructure with reciprocal-space probes alone can lead to ambiguous results with competing interpretations. Here we provide direct observations of the evolution of the superstructure in La1/3Ca2/3MnO3 in real space, as well as reciprocal space, using transmission electron microscopic (TEM) techniques. We show that the transitions are the consequence of a proliferation of dislocations plus electronic phase separation. The resulting states are well described by the symmetries associated with electronic-liquid-crystal (ELC) phases. Moreover, our results resolve the long-standing controversy over the origin of the incommensurate superstructure and suggest a new structural model that is consistent with recent theoretical calculations. © The Author(s) 2016.
Source Title: Scientific Reports
ISSN: 2045-2322
DOI: 10.1038/srep37624
Rights: Attribution 4.0 International
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