Photo-transport properties of Pb{sub 2}CrO{sub 5} single crystals

Mondal, P. S.; Taniguchi, H.; Terasaki, I.

doi:10.1063/1.4902248

Title: Photo-transport properties of Pb{sub 2}CrO{sub 5} single crystals

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Abstract

We report photo-thermoelectric transport phenomena in Pb{sub 2}CrO{sub 5} single crystals. Without illumination, this material exhibits an insulating behavior characterized by an activation-type temperature variation of the electrical conductivity. The Seebeck coefficient contrastingly shows a crossover from high-temperature insulating to low-temperature metallic behavior, which is attributed to degenerate carriers in a donor level. We have found that under illumination, both the conductivity and the Seebeck coefficient increase in magnitude with increasing photon flux density in the degenerate-conduction regime. This result is difficult to understand within a simple photo-doping effect, which usually leads to a decrease in the Seebeck coefficient under illumination. The observed phenomenon is discussed in terms of a two-carrier contribution to the transport properties.

Authors:

Mondal, P. S.; Taniguchi, H.; Terasaki, I. ^[1]

Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)

Publication Date:: Fri Nov 21 00:00:00 EST 2014

OSTI Identifier:: 22402665

Resource Type:: Journal Article

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 116; Journal Issue: 19; Other Information: (c) 2014 AIP Publishing LLC; 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; ELECTRIC CONDUCTIVITY; FLUX DENSITY; LEAD; MONOCRYSTALS; PHOTONS; VARIATIONS

Citation Formats


                    Mondal, P. S., Okazaki, R., E-mail: okazaki.ryuji@cc.nagoya-u.ac.jp, Taniguchi, H., and Terasaki, I. Photo-transport properties of Pb{sub 2}CrO{sub 5} single crystals.  United States: N. p., 2014. 
        Web.  doi:10.1063/1.4902248.

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                    Mondal, P. S., Okazaki, R., E-mail: okazaki.ryuji@cc.nagoya-u.ac.jp, Taniguchi, H., & Terasaki, I. Photo-transport properties of Pb{sub 2}CrO{sub 5} single crystals.  United States.  https://doi.org/10.1063/1.4902248

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                    Mondal, P. S., Okazaki, R., E-mail: okazaki.ryuji@cc.nagoya-u.ac.jp, Taniguchi, H., and Terasaki, I. 2014.  
        "Photo-transport properties of Pb{sub 2}CrO{sub 5} single crystals".  United States.  https://doi.org/10.1063/1.4902248.

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@article{osti_22402665,

  title        = {Photo-transport properties of Pb{sub 2}CrO{sub 5} single crystals},

  author       = {Mondal, P. S. and Okazaki, R., E-mail: okazaki.ryuji@cc.nagoya-u.ac.jp and Taniguchi, H. and Terasaki, I.},

  abstractNote = {We report photo-thermoelectric transport phenomena in Pb{sub 2}CrO{sub 5} single crystals. Without illumination, this material exhibits an insulating behavior characterized by an activation-type temperature variation of the electrical conductivity. The Seebeck coefficient contrastingly shows a crossover from high-temperature insulating to low-temperature metallic behavior, which is attributed to degenerate carriers in a donor level. We have found that under illumination, both the conductivity and the Seebeck coefficient increase in magnitude with increasing photon flux density in the degenerate-conduction regime. This result is difficult to understand within a simple photo-doping effect, which usually leads to a decrease in the Seebeck coefficient under illumination. The observed phenomenon is discussed in terms of a two-carrier contribution to the transport properties.},

  doi          = {10.1063/1.4902248},

  url          = {https://www.osti.gov/biblio/22402665},
  journal      = {Journal of Applied Physics},

  issn         = {0021-8979},

  number       = 19,

  volume       = 116,

  place        = {United States},

  year         = {Fri Nov 21 00:00:00 EST 2014},

  month        = {Fri Nov 21 00:00:00 EST 2014}

}

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