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Title: Anisotropic strain induced directional metallicity in highly epitaxial LaBaCo2O5.5+δ thin films on (110) NdGaO3

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep37337· OSTI ID:1361203
 [1];  [2];  [3];  [4];  [4];  [4];  [5];  [6];  [7];  [4]
  1. Xi'an Jiaotong Univ., Shaanxi (People's Republic of China); Univ. of Texas, San Antonio, TX (United States)
  2. Chinese Academy of Sciences, Changchun (People's Republic of China); Rensselaer Polytechnic Inst., Troy, NY (United States)
  3. Xi'an Jiaotong Univ., Shaanxi (People's Republic of China)
  4. Univ. of Texas, San Antonio, TX (United States)
  5. Univ. of Electronic Science and Technology of China, Sichuan (People's Republic of China)
  6. Univ. of Texas, Arlington, TX (United States)
  7. Rensselaer Polytechnic Inst., Troy, NY (United States)

Highly directional-dependent metal-insulator transition is observed in epitaxial double perovskite LaBaCo2O5.5+δ films. The film exhibit metallic along [100], but remain semiconducting along [010] under application of a magnetic field parallel to the surface of the film. The physical origin for the properties is identified as in-plane tensile strain arising from oxygen vacancies. First-principle calculations suggested the tensile strain drastically alters the band gap, and the vanishing gap opens up [100] conduction channels for Fermi-surface electrons. Lastly, our observation of strain-induced highly directional-dependent metal-insulator transition may open up new dimension for multifunctional devices.

Research Organization:
Univ. of Texas at San Antonio, TX (United States); Rensselaer Polytechnic Inst., Troy, NY (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FE0003780; SC0002623
OSTI ID:
1361203
Journal Information:
Scientific Reports, Vol. 6, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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Cited By (1)

Anisotropy in static and terahertz dynamic conductivities across in-plane axes of lanthanum nickel oxide thin films journal September 2018