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Title: Structural “ δ Doping” to Control Local Magnetization in Isovalent Oxide Heterostructures

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [4];  [5];  [2];  [1]
  1. Drexel Univ., Philadelphia, PA (United States). Department of Materials Science and Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  3. Vanderbilt Univ., Nashville, TN (United States). Department of Physics and Astronomy and Department of Electrical Engineering and Computer Science; SRM University, Kattankulathur (India). SRM Research Institute and Department of Physics and Nanotechnology
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
  5. Vanderbilt Univ., Nashville, TN (United States). Department of Physics and Astronomy and Department of Electrical Engineering and Computer Science

Modulation and δ-doping strategies, in which atomically thin layers of charged dopants are precisely deposited within a heterostructure, have played enabling roles in the discovery of new physical behavior in electronic materials. Here in this paper, we demonstrate a purely structural “δ-doping” strategy in complex oxide heterostructures, in which atomically thin manganite layers are inserted into an isovalent manganite host, thereby modifying the local rotations of corner-connected MnO6 octahedra. Combining scanning transmission electron microscopy, polarized neutron reflectometry, and density functional theory, we reveal how local magnetic exchange interactions are enhanced within the spatially confined regions of suppressed octahedral rotations. Finally, the combined experimental and theoretical results illustrate the potential to utilize noncharge-based approaches to “doping” in order to enhance or suppress functional properties within spatially confined regions of oxide heterostructures.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Vanderbilt Univ., Nashville, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
AC05-00OR22725; FG02-09ER46554; AC02-05CH11231
OSTI ID:
1422576
Alternate ID(s):
OSTI ID: 1408059; OSTI ID: 1597856
Journal Information:
Physical Review Letters, Vol. 119, Issue 19; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Cited By (7)

Removal of the Magnetic Dead Layer by Geometric Design journal May 2018
Interface Engineered Room‐Temperature Ferromagnetic Insulating State in Ultrathin Manganite Films journal November 2019
Confinement of magnetism in atomically thin La0.7Sr0.3CrO3/La0.7Sr0.3MnO3 heterostructures journal May 2019
Correlation between epitaxial strain and magnetic properties in La 0.7 Sr 0.3 CoO 3 /La 0.7 Sr 0.3 MnO 3 bilayers journal February 2019
Interface Engineered Room-Temperature Ferromagnetic Insulating State in Ultrathin Manganite Films. text January 2020
Interface Engineered Room-Temperature Ferromagnetic Insulating State in Ultrathin Manganite Films. text January 2019
Confinement of magnetism in atomically-thin $La_{0.7}Sr_{0.3}CrO_3$/$La_{0.7}Sr_{0.3}MnO_3$ heterostructures text January 2017