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AC Electrical Conduction of Cr-Doped SrTiO3 Thin Films with an Oxygen-Deficient Interface Layer

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Abstract

The ac electrical conduction of Cr-doped SrTiO3 thin films with an oxygen-deficient interface layer was investigated as a function of temperature and frequency. The Cr-doped SrTiO3 (Cr-STO) thin films with an ultra-thin (∼2 nm) oxygen-deficient layer inserted between the top electrode and the Cr-STO layer exhibited two ac conduction mechanisms, i.e., variable-range hopping and small-polaron hopping conduction, accompanied by a relaxation process. Since high oxygen deficiency induces large lattice distortion in the depletion layer, the first relaxation process occurs at low frequencies in the thin oxygen depletion layer Cr-SrTiO3−δ , and the corresponding conduction behavior follows the small-polaron tunneling model. In the high frequency range, an additional relaxation process is involved and is associated with the variable-range hopping between the localized states in the band gap of the thick Cr-SrTiO3 layer.

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References

  1. D.E. Grupp and A.M. Goldman, Science 276, 392 (1997).

    Article  Google Scholar 

  2. R.L. Wild, E.M. Rockar, and J.C. Smith, Phys. Rev. B 8, 3828 (1973).

    Article  Google Scholar 

  3. A. Beck, J.G. Bednorz, Ch Gerber, C. Rossel, and D. Widmer, Appl. Phys. Lett. 77, 139 (2000).

    Article  Google Scholar 

  4. M. Janousch, G.I. Meijer, U. Staub, B. Delley, S.F. Karg, and B.P. Andreasson, Adv. Mater. 19, 2232 (2007).

    Article  Google Scholar 

  5. B.T. Phan, C. Jung, T. Choi, and J. Lee, J. Korean Phys. Soc. 51, 664 (2007).

    Article  Google Scholar 

  6. K. Szot, W. Speier, G. Bihlmayer, and R. Waser, Nat. Mater. 5, 312 (2006).

    Article  Google Scholar 

  7. M. Quintero, P. Levy, A.G. Leyva, and M.J. Rozenberg, Phys. Rev. Lett. 98, 116601 (2007).

    Article  Google Scholar 

  8. B.T. Phan and J. Lee, Appl. Phys. Lett. 93, 222906 (2008).

    Article  Google Scholar 

  9. B.T. Phan and J. Lee, Appl. Phys. Lett. 94, 232101 (2009).

    Article  Google Scholar 

  10. B.T. Phan, N.C. Kim, and J. Lee, J. Korean Phys. Soc. 54, 873 (2009).

    Article  Google Scholar 

  11. B.T. Phan, T. Choi, A. Romanenko, and J. Lee, Solid-State Electron. 75, 43 (2012).

    Article  Google Scholar 

  12. J.H. Kim, P.B. Thang, T. Choi, C. Jung, and J. Lee, J. Korean Phys. Soc. 49, S604 (2006).

    Google Scholar 

  13. E. Barsoukov and J.R. Macdonald, Impedance Spectroscopy—Theory, Experiment, and Applications, 2nd ed. (Hoboken: Wiley-Interscience, 2005).

    Book  Google Scholar 

  14. V. Gupta and A. Mansingh, Phys. Rev. B 49, 1989 (1994).

    Article  Google Scholar 

  15. C. Ang, Z. Yu, Z. Jing, P. Lunkenheimer, and A. Loidl, Phys. Rev. B 61, 3922 (2000).

    Article  Google Scholar 

  16. S.R. Elliott, Adv. Phys. 36, 135 (1987).

    Article  Google Scholar 

  17. A.K. Jonscher, Dielectric Relaxation in Solids (London: Chelsea Dielectric, 1983).

    Google Scholar 

  18. H. Jain and J.N. Mundy, J. Non-Cryst. Solids 91, 315 (1987).

    Article  Google Scholar 

  19. K. Funke, Prog. Solid St. Chem. 22, 111 (1993).

    Article  Google Scholar 

  20. N. Ortega, et al., Phy. Rev. B 77, 014111 (2008).

    Article  Google Scholar 

  21. A. Pelaiz-Barramco, M.P. Gutierrez-Amador, A. Huanosta, and R. Valenzuela, Appl. Phys. Lett. 73, 2039 (1998).

    Article  Google Scholar 

  22. A.A.A. Youssef, Z. Naturforsch. A Phys. Sci. 57, 263 (2002).

    Google Scholar 

  23. N. Kumari, S.B. Krupanidhi, K.B.R. Varma, J Mater Sci: Mater. Electron. 22, 639 (2011).

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Acknowledgements

This work is supported by the Basic Science Research Program through National Research Foundation of Korea (2009-0092809) and National Foundation of Science and Technology Development of Vietnam (NAFOSTED—103.99-2010.12).

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Authors and Affiliations

  1. School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, 440-746, Korea

    Bach Thang Phan, Ki Tae Eom & Jaichan Lee

  2. Faculty of Materials Science and Laboratory of Advanced Materials, University of Science, Vietnam National University, Ho Chi Minh City, Vietnam

    Bach Thang Phan

  3. Center for Innovative Materials and Architectures (INOMAR), Vietnam National University, Ho Chi Minh City, Vietnam

    Bach Thang Phan

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  1. Bach Thang Phan
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  2. Ki Tae Eom
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  3. Jaichan Lee
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Correspondence to Bach Thang Phan.

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Phan, B.T., Eom, K.T. & Lee, J. AC Electrical Conduction of Cr-Doped SrTiO3 Thin Films with an Oxygen-Deficient Interface Layer. J. Electron. Mater. 46, 3796–3800 (2017). https://doi.org/10.1007/s11664-016-5243-5

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  • DOI: https://doi.org/10.1007/s11664-016-5243-5

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