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

doi:10.1016/S0022-3697(00)00098-6

Two different types of pseudogaps in high-T_c superconductors

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

Research output: Contribution to journal › Article › peer-review

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 La_1.85Sr_0.15CuO₄ (LSCO). The ARPES spectrum of Bi2212 at the (π, 0)-(π, π) crossing shows a pseudogap at E_F above T_c, which is smoothly connected from the superconducting gap across T_c and closes slightly above T_c (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 E_F. The temperature-induced filling of the depletion persists far above T_c and T*. This suggests that there are two different pseudogaps in the high-T_c superconductors; one is likely associated with pairing and the other is attributed to the development of antiferromagnetic correlation.

Original language	English
Pages (from-to)	41-45
Number of pages	5
Journal	Journal of Physics and Chemistry of Solids
Volume	62
Issue number	1-2
DOIs	https://doi.org/10.1016/S0022-3697(00)00098-6
Publication status	Published - Jan 2001
Externally published	Yes

ASJC Scopus subject areas

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

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@article{bd3dcd4acb114376a9dd3e0cc49047c6,

title = "Two different types of pseudogaps in high-Tc superconductors",

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.",

author = "T. Takahashi and T. Sato and T. Yokoya and T. Kamiyama and Y. Naitoh and T. Mochiku and K. Yamada and Y. Endoh and K. Kadowaki",

year = "2001",

month = jan,

doi = "10.1016/S0022-3697(00)00098-6",

language = "English",

volume = "62",

pages = "41--45",

journal = "Journal of Physics and Chemistry of Solids",

issn = "0022-3697",

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number = "1-2",

}

TY - JOUR

T1 - Two different types of pseudogaps in high-Tc superconductors

AU - Takahashi, T.

AU - Sato, T.

AU - Yokoya, T.

AU - Kamiyama, T.

AU - Naitoh, Y.

AU - Mochiku, T.

AU - Yamada, K.

AU - Endoh, Y.

AU - Kadowaki, K.

PY - 2001/1

Y1 - 2001/1

N2 - 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.

AB - 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.

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JO - Journal of Physics and Chemistry of Solids

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