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Title: Real Space Visualization of Competing Phases in La 0.6Sr 2.4Mn 2O 7 Single Crystals

Abstract

We report that correlated quantum materials are expected to provide the foundation for the next generation of information or energy technologies. A key feature of these materials is the proximity of multiple ground states close in energy, which results in the ability to tune properties with small changes in an external parameter such as magnetic field, composition, or temperature. For example, the colossal magnetoresistance exhibited by manganites is related to charge and orbital ordering and results from a metallic ferromagnetic phase in proximity to a paramagnetic insulating phase. The presence of competing ground states, at the heart of the physics and functionality of these materials, often results in nanoscale phase separation. Probing nanoscale phase separation with conventional diffraction techniques alone is not adequate, particularly when the domains are small or nanosized. In the present work we use a scanning transmission electron microscopy image-based technique of picometer precision strain maps (PPSM) to directly visualize the competing nanoscale phases with charge and orbital ordering in a double-layer manganite. Finally, this work underscores the role of subtle structural distortions in determining the electron physics in correlated quantum materials and provides insights into designing new functionalities via spatially tuning multiple competing ground states.

Authors:
ORCiD logo [1];  [2];  [2]; ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1482431
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Chemistry of Materials
Additional Journal Information:
Journal Volume: 30; Journal Issue: 21; Journal ID: ISSN 0897-4756
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Zheng, Qiang, Schreiber, Nathaniel J., Zheng, Hong, Yan, Jiaqiang, Mcguire, Michael A., Mitchell, J. F., Chi, Miaofang, and Sales, Brian C. Real Space Visualization of Competing Phases in La0.6Sr2.4Mn2O7 Single Crystals. United States: N. p., 2018. Web. doi:10.1021/acs.chemmater.8b03589.
Zheng, Qiang, Schreiber, Nathaniel J., Zheng, Hong, Yan, Jiaqiang, Mcguire, Michael A., Mitchell, J. F., Chi, Miaofang, & Sales, Brian C. Real Space Visualization of Competing Phases in La0.6Sr2.4Mn2O7 Single Crystals. United States. doi:10.1021/acs.chemmater.8b03589.
Zheng, Qiang, Schreiber, Nathaniel J., Zheng, Hong, Yan, Jiaqiang, Mcguire, Michael A., Mitchell, J. F., Chi, Miaofang, and Sales, Brian C. Mon . "Real Space Visualization of Competing Phases in La0.6Sr2.4Mn2O7 Single Crystals". United States. doi:10.1021/acs.chemmater.8b03589.
@article{osti_1482431,
title = {Real Space Visualization of Competing Phases in La0.6Sr2.4Mn2O7 Single Crystals},
author = {Zheng, Qiang and Schreiber, Nathaniel J. and Zheng, Hong and Yan, Jiaqiang and Mcguire, Michael A. and Mitchell, J. F. and Chi, Miaofang and Sales, Brian C.},
abstractNote = {We report that correlated quantum materials are expected to provide the foundation for the next generation of information or energy technologies. A key feature of these materials is the proximity of multiple ground states close in energy, which results in the ability to tune properties with small changes in an external parameter such as magnetic field, composition, or temperature. For example, the colossal magnetoresistance exhibited by manganites is related to charge and orbital ordering and results from a metallic ferromagnetic phase in proximity to a paramagnetic insulating phase. The presence of competing ground states, at the heart of the physics and functionality of these materials, often results in nanoscale phase separation. Probing nanoscale phase separation with conventional diffraction techniques alone is not adequate, particularly when the domains are small or nanosized. In the present work we use a scanning transmission electron microscopy image-based technique of picometer precision strain maps (PPSM) to directly visualize the competing nanoscale phases with charge and orbital ordering in a double-layer manganite. Finally, this work underscores the role of subtle structural distortions in determining the electron physics in correlated quantum materials and provides insights into designing new functionalities via spatially tuning multiple competing ground states.},
doi = {10.1021/acs.chemmater.8b03589},
journal = {Chemistry of Materials},
issn = {0897-4756},
number = 21,
volume = 30,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
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