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Title: Strain Doping: Reversible Single-Axis Control of a Complex Oxide Lattice via Helium Implantation

Journal Article · · Physical Review Letters

We report on the use of helium ion implantation to independently control the out-of-plane lattice constant in epitaxial La0.7Sr0.3MnO3 thin films without changing the in-plane lattice constants. The process is reversible by a vacuum anneal. Resistance and magnetization measurements show that even a small increase in the out-of-plane lattice constant of less than 1% can shift the metal-insulator transition and Curie temperatures by more than 100 °C. Unlike conventional epitaxy-based strain tuning methods which are constrained not only by the Poisson effect but by the limited set of available substrates, the present study shows that strain can be independently and continuously controlled along a single axis. This permits novel control over orbital populations through Jahn-Teller effects, as shown by Monte Carlo simulations on a double-exchange model. As a result, the ability to reversibly control a single lattice parameter substantially broadens the phase space for experimental exploration of predictive models and leads to new possibilities for control over materials’ functional properties.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0002136; AC05-00OR22725
OSTI ID:
1198520
Alternate ID(s):
OSTI ID: 1190744
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Vol. 114 Journal Issue: 25; ISSN 0031-9007
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 63 works
Citation information provided by
Web of Science

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  • Livengood, Richard; Tan, Shida; Greenzweig, Yuval
  • Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, Vol. 27, Issue 6 https://doi.org/10.1116/1.3237101
journal January 2009
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