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Title: Direct observation of electronic-liquid-crystal phase transitions and their microscopic origin in La1/3Ca2/3MnO3

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. Furthermore, 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.

Authors:
 [1];  [2];  [1];  [1];  [3];  [4];  [5];  [6];  [1];  [1]
+ Show Author Affiliations
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics & Materials Science Dept.
  2. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Physics
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Shanghai JiaoTong Univ., Shanghai (China). Dept. of Physics & Astronomy
  6. National Univ. of Singapore (Singapore). Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1427768
Alternate Identifier(s):
OSTI ID: 1342647
Report Number(s):
BNL-113462-2017-JA
Journal ID: ISSN 2045-2322; 141500
Grant/Contract Number:  
AC02-06CH11357; SC0012704; ECCS-1307744
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; Phase transitions and critical phenomena; Structure of solids and liquids

Citation Formats

Tao, J., Sun, K., Yin, W. -G., Wu, L., Xin, H., Wen, J. G., Luo, W., Pennycook, S. J., Tranquada, J. M., and Zhu, Y. Direct observation of electronic-liquid-crystal phase transitions and their microscopic origin in La1/3Ca2/3MnO3. United States: N. p., 2016. Web. doi:10.1038/srep37624.
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Tao, J., Sun, K., Yin, W. -G., Wu, L., Xin, H., Wen, J. G., Luo, W., Pennycook, S. J., Tranquada, J. M., & Zhu, Y. Direct observation of electronic-liquid-crystal phase transitions and their microscopic origin in La1/3Ca2/3MnO3. United States. https://doi.org/10.1038/srep37624
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Tao, J., Sun, K., Yin, W. -G., Wu, L., Xin, H., Wen, J. G., Luo, W., Pennycook, S. J., Tranquada, J. M., and Zhu, Y. Tue . "Direct observation of electronic-liquid-crystal phase transitions and their microscopic origin in La1/3Ca2/3MnO3". United States. https://doi.org/10.1038/srep37624. https://www.osti.gov/servlets/purl/1427768.
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@article{osti_1427768,
title = {Direct observation of electronic-liquid-crystal phase transitions and their microscopic origin in La1/3Ca2/3MnO3},
author = {Tao, J. and Sun, K. and Yin, W. -G. and Wu, L. and Xin, H. and Wen, J. G. and Luo, W. and Pennycook, S. J. and Tranquada, J. M. and Zhu, Y.},
abstractNote = {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. Furthermore, 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.},
doi = {10.1038/srep37624},
journal = {Scientific Reports},
number = 1,
volume = 6,
place = {United States},
year = {Tue Nov 22 00:00:00 EST 2016},
month = {Tue Nov 22 00:00:00 EST 2016}
}
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https://doi.org/10.1038/srep37624
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