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Two-dimensional electron gas at the interface of Ba0.8Sr0.2TiO3 ferroelectric and LaMnO3 antiferomagnet

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Abstract

The temperature dependence of the electrical resistance has been studied for heterostructures formed by antiferromagnetic LaMnO3 single crystals of different orientations with epitaxial films of ferroelectric Ba0.8Sr0.2TiO3 deposited onto them. The measured electrical resistance is compared to that exhibited by LaMnO3 single crystals without the films. It is found that, in the samples with the film, for which the axis of polarization in the ferroelectric is directed along the perpendicular to the surface of the single crystal, the electrical resistance decreases significantly with temperature, exhibiting metallic behavior below 160 K. The numerical simulations of the structural and electronic characteristics of the BaTiO3/LaMnO3 ferroelectric−antiferromagnet heterostructure has been performed. The transition to the state with two-dimensional electron gas at the interface is demonstrated.

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Authors and Affiliations

  1. Zavoisky Physical-Technical Institute, Kazan Scientific Center, Russian Academy of Sciences, Kazan, 420029, Russia

    D. P. Pavlov, I. I. Piyanzina, I. A. Garifullin & R. F. Mamin

  2. Kazan Federal University, Kazan, 420008, Russia

    I. I. Piyanzina, D. A. Tayurskii & R. F. Mamin

  3. Southern Scientific Center, Russian Academy of Sciences, Rostov-on-Don, 344006, Russia

    V. M. Mukhortov

  4. Moscow Power Engineering Institute, Moscow, 111250, Russia

    A. M. Balbashov

Authors
  1. D. P. Pavlov
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  2. I. I. Piyanzina
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  3. V. M. Mukhortov
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  4. A. M. Balbashov
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  5. D. A. Tayurskii
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  6. I. A. Garifullin
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  7. R. F. Mamin
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Correspondence to R. F. Mamin.

Additional information

Original Russian Text © D.P. Pavlov, I.I. Piyanzina, V.M. Mukhortov, A.M. Balbashov, D.A. Tayurskii, I.A. Garifullin, R.F. Mamin, 2017, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2017, Vol. 106, No. 7, pp. 440–444.

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Pavlov, D.P., Piyanzina, I.I., Mukhortov, V.M. et al. Two-dimensional electron gas at the interface of Ba0.8Sr0.2TiO3 ferroelectric and LaMnO3 antiferomagnet. Jetp Lett. 106, 460–464 (2017). https://doi.org/10.1134/S0021364017190109

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  • DOI: https://doi.org/10.1134/S0021364017190109

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