Possible mechanism of eemiconductive temperature dependence of c-axis resistivity in the normal state of high-Tc superconductors: Renormalization effect of fermi surface by antiferromagnetic spin fluctuations

Masakazu Terao, Yoji Ohashi

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We propose a mechanism of the semiconductive temperature dependence of the c-axis resistivity (ρc) in the normal state of high-Tc superconductors. We show that antiferromagnetic spin fluctuations in the CuO2-layer affect the temperature dependence of the Fermi surface shape and that they decrease (increase) the conductive carrier density (band mass) in the c-direction. Thus, when this effect dominates the temperature dependence of ρc, ρc increases at low temperatures. On the other hand, in the in-plane direction, the AF spin fluctuations do not affect the carrier density while they decrease the so-called k-mass at low temperatures. As a consequence, taking into account the damping rate which is caused by the electron-electron interaction, we obtain the in-plane resistivity (ρab) which decreases with decreasing temperature. Thus, the present mechanism can explain the semiconductive temperature dependence of ρc satisfying the metallic behavior of ρab.

Original languageEnglish
Pages (from-to)233-240
Number of pages8
JournalJournal of the Physical Society of Japan
Issue number1
Publication statusPublished - 2001 Jan 1



  • Antiferromagnetic spin fluctuations
  • High-T
  • Renormalization effect of Fermi surface
  • Resistivity
  • Superconductors

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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