Electric transport coefficients in highly epitaxial LaBaCo{sub 2}O{sub 5 + δ} films with “p-to-n” transition induced by oxygen deficiency

Shaibo, J.; Hu, H. C.; Li, X. N.; Pan, L. J.; Wang, Y. Q.

doi:10.1063/1.4960688

Title: Electric transport coefficients in highly epitaxial LaBaCo{sub 2}O{sub 5 + δ} films with “p-to-n” transition induced by oxygen deficiency

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Abstract

Electric transport coefficients such as carrier type, density, and mobility are the important physical parameters in designing functional devices. In this work, we report the study on the electric transport coefficients of the highly epitaxial LaBaCo{sub 2}O{sub 5 + δ} (LBCO) films, which were discussed as a function of electric conductivity for the first time and compared with the results calculated by the theory for mixed conduction. The mobility in the LBCO films was determined to be ∼0.85 and ∼40 cm{sup 2}/V s for holes and electrons, respectively, and the density of p-type carriers strongly depends on the oxygen deficiency. Solid evidence is presented to demonstrate that the oxygen deficiency cannot make LBCO materials changed from p- to n-type. The n-type conduction observed in experiment is a counterfeit phenomenon caused by the deficiency in Hall measurement, rather than a realistic transition induced by oxygen deficiency. In addition, the temperature-dependent conductivity was discussed using the differential coefficients, which might be useful in the study of the samples with magnetic transition.

Authors:

Shaibo, J.; Hu, H. C.; Li, X. N.; Pan, L. J. ^[1]; Wang, Y. Q. ^[2]

Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, and School of Physics and Opto-electronic Technology, Dalian University of Technology, Dalian 116024 (China)
College of Physics, Qingdao University, Qingdao 266071 (China)

Publication Date:: Sun Aug 14 00:00:00 EDT 2016

OSTI Identifier:: 22597706

Resource Type:: Journal Article

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 120; Journal Issue: 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CARRIERS; COMPARATIVE EVALUATIONS; DENSITY; ELECTRIC CONDUCTIVITY; ELECTRONS; EPITAXY; FILMS; MOBILITY; OXYGEN; TEMPERATURE DEPENDENCE; TRANSPORT THEORY

Citation Formats


                    Shaibo, J., Zhang, Q. Y., E-mail: qyzhang@dlut.edu.cn, Hu, H. C., Li, X. N., Pan, L. J., and Wang, Y. Q. Electric transport coefficients in highly epitaxial LaBaCo{sub 2}O{sub 5 + δ} films with “p-to-n” transition induced by oxygen deficiency.  United States: N. p., 2016. 
        Web.  doi:10.1063/1.4960688.

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                    Shaibo, J., Zhang, Q. Y., E-mail: qyzhang@dlut.edu.cn, Hu, H. C., Li, X. N., Pan, L. J., & Wang, Y. Q. Electric transport coefficients in highly epitaxial LaBaCo{sub 2}O{sub 5 + δ} films with “p-to-n” transition induced by oxygen deficiency.  United States.  https://doi.org/10.1063/1.4960688

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                    Shaibo, J., Zhang, Q. Y., E-mail: qyzhang@dlut.edu.cn, Hu, H. C., Li, X. N., Pan, L. J., and Wang, Y. Q. 2016.  
        "Electric transport coefficients in highly epitaxial LaBaCo{sub 2}O{sub 5 + δ} films with “p-to-n” transition induced by oxygen deficiency".  United States.  https://doi.org/10.1063/1.4960688.

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@article{osti_22597706,

  title        = {Electric transport coefficients in highly epitaxial LaBaCo{sub 2}O{sub 5 + δ} films with “p-to-n” transition induced by oxygen deficiency},

  author       = {Shaibo, J. and Zhang, Q. Y., E-mail: qyzhang@dlut.edu.cn and Hu, H. C. and Li, X. N. and Pan, L. J. and Wang, Y. Q.},

  abstractNote = {Electric transport coefficients such as carrier type, density, and mobility are the important physical parameters in designing functional devices. In this work, we report the study on the electric transport coefficients of the highly epitaxial LaBaCo{sub 2}O{sub 5 + δ} (LBCO) films, which were discussed as a function of electric conductivity for the first time and compared with the results calculated by the theory for mixed conduction. The mobility in the LBCO films was determined to be ∼0.85 and ∼40 cm{sup 2}/V s for holes and electrons, respectively, and the density of p-type carriers strongly depends on the oxygen deficiency. Solid evidence is presented to demonstrate that the oxygen deficiency cannot make LBCO materials changed from p- to n-type. The n-type conduction observed in experiment is a counterfeit phenomenon caused by the deficiency in Hall measurement, rather than a realistic transition induced by oxygen deficiency. In addition, the temperature-dependent conductivity was discussed using the differential coefficients, which might be useful in the study of the samples with magnetic transition.},

  doi          = {10.1063/1.4960688},

  url          = {https://www.osti.gov/biblio/22597706},
  journal      = {Journal of Applied Physics},

  issn         = {0021-8979},

  number       = 6,

  volume       = 120,

  place        = {United States},

  year         = {Sun Aug 14 00:00:00 EDT 2016},

  month        = {Sun Aug 14 00:00:00 EDT 2016}

}

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