Small and large pseudogaps in high- Tc superconductors observed by ultrahigh-resolution photoemission spectroscopy

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

doi:10.1016/S0921-4534(00)00702-4

Small and large pseudogaps in high- T_c superconductors observed by ultrahigh-resolution photoemission spectroscopy

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

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

20 Citations (Scopus)

Abstract

Two different (small and large) pseudogaps have been observed by ultrahigh-resolution photoeraission spectroscopy in optimally doped Bi₂Sr₂CaCu₂O₈ and La_1.85Sr_0.15GuO₄. The small pseudogap is smoothly connected from the superconducting gap and closes slightly above T_c, while the large one appears as a remarkable depletion of the density of states in a wider energy range near E_F and persists far above T_c. The small pseudogap is likely associated with pairing and the large one is ascribed to the development of antiferromagnetic correlation.

Original language	English
Pages (from-to)	815-818
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	341-348
Issue number	PART 3
DOIs	https://doi.org/10.1016/S0921-4534(00)00702-4
Publication status	Published - Jan 1 2000
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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Small and large pseudogaps in high- T_c superconductors observed by ultrahigh-resolution photoemission spectroscopy. / Sato, T.; Naitoh, Y.; Kamiyama, T.; Takahashi, T.; Yokoya, T.; Yamada, K.; Endoh, Y.; Kadowaki, K.

In: Physica C: Superconductivity and its applications, Vol. 341-348, No. PART 3, 01.01.2000, p. 815-818.

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

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abstract = "Two different (small and large) pseudogaps have been observed by ultrahigh-resolution photoeraission spectroscopy in optimally doped Bi2Sr2CaCu2O8 and La1.85Sr0.15GuO4. The small pseudogap is smoothly connected from the superconducting gap and closes slightly above Tc, while the large one appears as a remarkable depletion of the density of states in a wider energy range near EF and persists far above Tc. The small pseudogap is likely associated with pairing and the large one is ascribed to the development of antiferromagnetic correlation.",

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