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Large pseudogap and nodal superconducting gap in Bi2Sr_[2-x]LaxCuO_[6+δ] and Bi2Sr2CaCu2O_[8+δ] : Scanning tunneling microscopy and spectroscopy

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Title: Large pseudogap and nodal superconducting gap in Bi2Sr_[2-x]LaxCuO_[6+δ] and Bi2Sr2CaCu2O_[8+δ] : Scanning tunneling microscopy and spectroscopy
Authors: Kurosawa, T. Browse this author
Yoneyama, T. Browse this author
Takano, Y. Browse this author
Hagiwara, M. Browse this author
Inoue, R. Browse this author
Hagiwara, N. Browse this author
Kurusu, K. Browse this author
Takeyama, K. Browse this author
Momono, N. Browse this author
Oda, M. Browse this author
Ido, M. Browse this author
Issue Date: 1-Mar-2010
Publisher: American Physical Society
Journal Title: Physical Review B
Volume: 81
Issue: 9
Start Page: 094519
Publisher DOI: 10.1103/PhysRevB.81.094519
Abstract: In the present work, scanning tunneling microscopy/spectroscopy (STM/STS) measurements were carried out on underdoped Bi2Sr_[2-x]LaxCuO_[6+δ] and Bi2Sr2CaCu2O_[8+δ] to clarify the origin of the pseudogap, in particular, the inhomogeneous large pseudogap. The nodal part of a d-wave pairing gap, which is under no influence of the inhomogeneous large pseudogap, was also examined by relating the homogeneous bottom part of the STS gap to a nodal d-wave gap in momentum space. We report that the inhomogeneous large pseudogap in the antinodal region links to a two-dimensional electronic charge order, and that the gap size of the nodal d-wave part Δsc scales with the superconducting critical temperature Tc in the pseudogap regime.
Rights: ©2010 The American Physical Society
Type: article
URI: http://hdl.handle.net/2115/42972
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 伊土 政幸

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