Two different types of pseudogaps in high-Tc superconductors

T. Takahashi, T. Sato, T. Yokoya, T. Kamiyama, Y. Naitoh, T. Mochiku, K. Yamada, Y. Endoh, K. Kadowaki

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15 Citations (Scopus)

Abstract

Ultrahigh-resolution (ΔE = 7 meV angle-resolved (ARPES) and angle-integrated (AIPES) photoemission spectroscopy have been performed on optimally doped Bi2Sr2CaCu2O8 (Bi2212) and La1.85Sr0.15CuO4 (LSCO). The ARPES spectrum of Bi2212 at the (π, 0)-(π, π) crossing shows a pseudogap at EF above Tc, which is smoothly connected from the superconducting gap across Tc and closes slightly above Tc (T* = 110 K). On the other hand, the AIPES spectra both in Bi2212 and LSCO show a remarkable depletion of the density of states in a relatively wider energy (100-150 meV) region near EF. The temperature-induced filling of the depletion persists far above Tc and T*. This suggests that there are two different pseudogaps in the high-Tc superconductors; one is likely associated with pairing and the other is attributed to the development of antiferromagnetic correlation.

Original languageEnglish
Pages (from-to)41-45
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume62
Issue number1-2
DOIs
Publication statusPublished - 2001 Jan

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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    Takahashi, T., Sato, T., Yokoya, T., Kamiyama, T., Naitoh, Y., Mochiku, T., Yamada, K., Endoh, Y., & Kadowaki, K. (2001). Two different types of pseudogaps in high-Tc superconductors. Journal of Physics and Chemistry of Solids, 62(1-2), 41-45. https://doi.org/10.1016/S0022-3697(00)00098-6