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Probing the field-induced variation of the chemical potential in Bi2Sr2CaCu2Oy via magneto-thermopower measurements

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Abstract

Approximating the shape of the magneto-thermoelectric power (TEP) ΔS(T,H) measured in Bi2Sr2CaCu2Oy by an asymmetric linear triangle of the form ΔS(T,H)≃S p (H)±B ±(H)(T c −T) with positive B −(H) and B +(H) defined below and above T c , we observe that B +(H) ≃2B −(H). To account for this asymmetry, we explicitly introduce the field-dependent chemical potential μ(H) of holes into the Ginzburg-Landau theory and calculate both an average ΔS av(T,H) and fluctuation contribution ΔS fl(T,H) to the total magneto-TEP ΔS(T,H). As a result, we find a rather simple relationship between the field-induced variation of the chemical potential in this material and the above-mentioned magneto-TEP data around T c , viz. Δ μ(H)∝S p (H).

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Authors and Affiliations

  1. SUPRAS, Institute of Physics, University of Liege, B-4000, Liege, Belgium

    S. A. Sergeenkov & M. Ausloos

  2. Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980, Dubna, Moscow Region, Russia

    S. A. Sergeenkov

Authors
  1. S. A. Sergeenkov
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  2. M. Ausloos
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Additional information

Zh. Éksp. Teor. Fiz. 116, 257–262 (July 1999)

Published in English in the original Russian journal. Reproduced here with stylistic changes by the Translation Editor.

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Sergeenkov, S.A., Ausloos, M. Probing the field-induced variation of the chemical potential in Bi2Sr2CaCu2Oy via magneto-thermopower measurements. J. Exp. Theor. Phys. 89, 140–143 (1999). https://doi.org/10.1134/1.558964

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  • DOI: https://doi.org/10.1134/1.558964

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