Proximity-induced nodal metal in an extremely underdoped CuO2 plane in triple-layer cuprates

Shin-ichiro Ideta (), Shintaro Adachi, Takashi Noji, Shunpei Yamaguchi, Nae Sasaki, Shigeyuki Ishida, Shin-ichi Uchida, Takenori Fujii, Takao Watanabe, Wen O. Wang, Brian Moritz, Thomas P. Devereaux, Masashi Arita, Chung-Yu Mou, Teppei Yoshida, Kiyohisa Tanaka, Ting-Kuo Lee and Atsushi Fujimori ()
Additional contact information
Shin-ichiro Ideta: Hiroshima University
Shintaro Adachi: Hirosaki University
Takashi Noji: Tohoku University
Shunpei Yamaguchi: Hirosaki University
Nae Sasaki: Hirosaki University
Shigeyuki Ishida: National Institute of Advanced Industrial Science and Technology
Shin-ichi Uchida: National Institute of Advanced Industrial Science and Technology
Takenori Fujii: The University of Tokyo
Takao Watanabe: Hirosaki University
Wen O. Wang: Stanford University
Brian Moritz: SLAC National Accelerator Laboratory
Thomas P. Devereaux: SLAC National Accelerator Laboratory
Masashi Arita: Hiroshima University
Chung-Yu Mou: National Tsing Hua University
Teppei Yoshida: Kyoto University
Kiyohisa Tanaka: Institute for Molecular Science
Ting-Kuo Lee: National Tsing Hua University
Atsushi Fujimori: University of Tokyo

Nature Communications, 2025, vol. 16, issue 1, 1-8

Abstract: Abstract We performed angle-resolved photoemission spectroscopy studies on the triple-layer Bi2Sr2Ca2Cu3O10+δ over a wide doping range. Although the doping level of the inner CuO2 plane is extremely low in underdoped samples, the d-wave SC gap is enhanced to the unprecedentedly large value of Δ0 ~ 80–100 meV at the antinode. This gap persists well above Tc without a Fermi arc, indicating a “nodal metal”. We attribute the nodal metallic behavior to the unique local environment of the inner clean CuO2 plane, sandwiched by nearly optimally-doped two outer planes and hence subject to strong proximity effect from both sides. In the nodal metal, quasiparticle peaks show electron-hole symmetry, suggesting d-wave pairing fluctuations. Thus the proximity effect on the innermost CuO2 plane is the strongest in the triple-layer cuprates, which explains why the Tc reaches the maximum at the layer number of three in every multi-layer cuprate family.

Date: 2025
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-025-64492-x Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-64492-x

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-025-64492-x

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().