Direct observation of electronic-liquid-crystal phase transitions and their microscopic origin in La1/3Ca2/3MnO3
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics & Materials Science Dept.
- Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Physics
- Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Shanghai JiaoTong Univ., Shanghai (China). Dept. of Physics & Astronomy
- National Univ. of Singapore (Singapore). Dept. of Materials Science and Engineering
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.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- 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)
- Grant/Contract Number:
- AC02-06CH11357; SC0012704; ECCS-1307744
- OSTI ID:
- 1427768
- Alternate ID(s):
- OSTI ID: 1342647
- Report Number(s):
- BNL-113462-2017-JA; 141500
- Journal Information:
- Scientific Reports, Vol. 6, Issue 1; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Four-Dimensional Scanning Transmission Electron Microscopy (4D-STEM): From Scanning Nanodiffraction to Ptychography and Beyond
|
journal | May 2019 |
Spontaneous Magnetic Superdomain Wall Fluctuations in an Artificial Antiferromagnet
|
journal | November 2019 |
Smectic and nematic phase modulations and transitions under electron beam in
|
journal | September 2019 |
Similar Records
Structural and magnetic properties of the single-layer manganese oxide La{sub 1-x}Sr{sub 1+x}MnO{sub 4}
Crystallographic analysis of orientational domain variants and charge-ordered domains in La{sub 0.33}Ca{sub 0.67}MnO{sub 3}