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Title: Interface reconstruction with emerging charge ordering in hexagonal manganite

Journal Article · · Science Advances
ORCiD logo [1];  [2]; ORCiD logo [3];  [4];  [3]; ORCiD logo [3];  [3]; ORCiD logo [5];  [6]; ORCiD logo [4]; ORCiD logo [3]
  1. Tsinghua Univ., Beijing (China). School of Materials Science and Engineering; Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Condensed Matter Physics and Materials Science
  2. Univ. of Arkansas, Fayetteville, AR (United States). Physics Dept. and Inst. for Nanoscience and Engineering; Tsinghua Univ., Beijing (China). State Key Lab. of Low-Dimensional Quantum Physics and Collaborative Innovation Center of Quantum Matter, Dept. of Physics
  3. Tsinghua Univ., Beijing (China). School of Materials Science and Engineering
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Condensed Matter Physics and Materials Science
  5. Tsinghua Univ., Beijing (China). State Key Lab. of Low-Dimensional Quantum Physics and Collaborative Innovation Center of Quantum Matter, Dept. of Physics
  6. Univ. of Arkansas, Fayetteville, AR (United States). Physics Dept. and Inst. for Nanoscience and Engineering

Multiferroic materials, which simultaneously have multiple orderings, hold promise for use in the next generation of memory devices. We report a novel self-assembled MnO double layer forming at the interface between a multiferroic YMnO3 film and a c-Al2O3 substrate. The crystal structures and the valence states of this MnO double layer were studied by atomically resolved scanning transmission electron microscopy and spectroscopy, as well as density functional theory (DFT) calculations. A new type of charge ordering has been identified within this MnO layer, which also contributes to a polarization along the [001] direction. DFT calculations further establish the occurrence of multiple couplings between charge and lattice in this novel double layer, in addition to the polarization in nearby YMnO3 single layer. The interface reconstruction reported here creates a new playground for emergent physics, such as giant ferroelectricity and strong magnetoelectric coupling, in manganite systems.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1462404
Report Number(s):
BNL-207873-2018-JAAM
Journal Information:
Science Advances, Vol. 4, Issue 5; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 32 works
Citation information provided by
Web of Science

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Cited By (8)

Revealing the Effects of Trace Oxygen Vacancies on Improper Ferroelectric Manganite with In Situ Biasing journal January 2019
Broadband photodetection of 2D Bi2O2Se–MoSe2 heterostructure journal September 2019
The ultrathin limit of improper ferroelectricity journal December 2019
Magnetic and electrical properties of LuFe 2 O 4 epitaxial thin films with a self-assembled interface structure journal January 2020
Design and understanding of core/branch-structured VS 2 nanosheets@CNTs as high-performance anode materials for lithium-ion batteries journal January 2019
Thermodynamics and multiferroicity in PbTiO 3 due to 4/5 d electrons doping journal March 2019
The ultrathin limit of improper ferroelectricity text January 2019
The ultrathin limit of improper ferroelectricity text January 2019

Figures / Tables (5)