Two different types of pseudogaps in high-Tc superconductors

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

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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 - Jan 2001
Externally publishedYes

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Photoelectron spectroscopy
Superconducting materials
depletion
photoelectric emission
Temperature
spectroscopy
temperature
energy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Takahashi, T., Sato, T., Yokoya, T., Kamiyama, T., Naitoh, Y., Mochiku, T., ... 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

Two different types of pseudogaps in high-Tc superconductors. / Takahashi, T.; Sato, T.; Yokoya, Takayoshi; Kamiyama, T.; Naitoh, Y.; Mochiku, T.; Yamada, K.; Endoh, Y.; Kadowaki, K.

In: Journal of Physics and Chemistry of Solids, Vol. 62, No. 1-2, 01.2001, p. 41-45.

Research output: Contribution to journalArticle

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, vol. 62, no. 1-2, pp. 41-45. https://doi.org/10.1016/S0022-3697(00)00098-6
Takahashi, T. ; Sato, T. ; Yokoya, Takayoshi ; Kamiyama, T. ; Naitoh, Y. ; Mochiku, T. ; Yamada, K. ; Endoh, Y. ; Kadowaki, K. / Two different types of pseudogaps in high-Tc superconductors. In: Journal of Physics and Chemistry of Solids. 2001 ; Vol. 62, No. 1-2. pp. 41-45.
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AU - Mochiku, T.

AU - Yamada, K.

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