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 - 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, 2000, p. 815-818.

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

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title = "Small and large pseudogaps in high- Tc superconductors observed by ultrahigh-resolution photoemission spectroscopy",

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.",

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

note = "Funding Information: This work was supported by grants from the CREST (Core Research for Evolutional Science and Technology Corporation) of JST, the Japan Society for Promotion of Science (JSPS), and the Ministry of Education, Science and Culture of Japan. TS thanks the JSPS for financial support.",

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T1 - Small and large pseudogaps in high- Tc superconductors observed by ultrahigh-resolution photoemission spectroscopy

AU - Sato, T.

AU - Naitoh, Y.

AU - Kamiyama, T.

AU - Takahashi, T.

AU - Yokoya, T.

AU - Yamada, K.

AU - Endoh, Y.

AU - Kadowaki, K.

N1 - Funding Information: This work was supported by grants from the CREST (Core Research for Evolutional Science and Technology Corporation) of JST, the Japan Society for Promotion of Science (JSPS), and the Ministry of Education, Science and Culture of Japan. TS thanks the JSPS for financial support.

PY - 2000

Y1 - 2000

N2 - 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.

AB - 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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