Nodeless pairing in superconducting copper-oxide monolayer films on Bi2Sr2CaCu2O8+δ
Abstract
We report that the pairing mechanism of high-temperature superconductivity in cuprates remains the biggest unresolved mystery in condensed matter physics. To solve the problem, one of the most effective approaches is to investigate directly the superconducting CuO2 layers. Here, by growing CuO2 monolayer films on Bi2Sr2CaCu2O8+δ substrates, we identify two distinct and spatially separated energy gaps centered at the Fermi energy, a smaller U-like gap and a larger V-like gap on the films, and study their interactions with alien atoms by low-temperature scanning tunneling microscopy. The newly discovered U-like gap exhibits strong phase coherence and is immune to scattering by K, Cs and Ag atoms, suggesting its nature as a nodeless superconducting gap in the CuO2 layers, whereas the V-like gap agrees with the well-known pseudogap state in the underdoped regime. In conclusion, our results support an s-wave superconductivity in Bi2Sr2CaCu2O8+δ, which, we propose, originates from the modulation-doping resultant two-dimensional hole liquid confined in the CuO2 layers.
- Authors:
-
- Tsinghua Univ., Beijing (China). State Key Lab. of Low-Dimensional Quantum Physics, Dept. of Physics
- Tsinghua Univ., Beijing (China). State Key Lab. of Low-Dimensional Quantum Physics, Dept. of Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China)
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Stony Brook Univ., NY (United States). Dept. of Physics and Astronomy
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1336200
- Alternate Identifier(s):
- OSTI ID: 1876538
- Report Number(s):
- BNL-113203-2016-JA
Journal ID: ISSN 2095-9273; R&D Project: PO010; KC0201060
- Grant/Contract Number:
- SC00112704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Science Bulletin
- Additional Journal Information:
- Journal Volume: 61; Journal Issue: 16; Journal ID: ISSN 2095-9273
- Publisher:
- Elsevier; Science China Press
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Copper oxides; Molecular beam epitaxy; Nodeless pairing; Modulation doping
Citation Formats
Zhong, Yong, Wang, Yang, Han, Sha, Lv, Yan-Feng, Wang, Wen-Lin, Zhang, Ding, Ding, Hao, Zhang, Yi-Min, Wang, Lili, He, Ke, Zhong, Ruidan, Schneeloch, John A., Gu, Gen-Da, Song, Can-Li, Ma, Xu-Cun, and Xue, Qi-Kun. Nodeless pairing in superconducting copper-oxide monolayer films on Bi2Sr2CaCu2O8+δ. United States: N. p., 2016.
Web. doi:10.1007/s11434-016-1145-4.
Zhong, Yong, Wang, Yang, Han, Sha, Lv, Yan-Feng, Wang, Wen-Lin, Zhang, Ding, Ding, Hao, Zhang, Yi-Min, Wang, Lili, He, Ke, Zhong, Ruidan, Schneeloch, John A., Gu, Gen-Da, Song, Can-Li, Ma, Xu-Cun, & Xue, Qi-Kun. Nodeless pairing in superconducting copper-oxide monolayer films on Bi2Sr2CaCu2O8+δ. United States. https://doi.org/10.1007/s11434-016-1145-4
Zhong, Yong, Wang, Yang, Han, Sha, Lv, Yan-Feng, Wang, Wen-Lin, Zhang, Ding, Ding, Hao, Zhang, Yi-Min, Wang, Lili, He, Ke, Zhong, Ruidan, Schneeloch, John A., Gu, Gen-Da, Song, Can-Li, Ma, Xu-Cun, and Xue, Qi-Kun. Tue .
"Nodeless pairing in superconducting copper-oxide monolayer films on Bi2Sr2CaCu2O8+δ". United States. https://doi.org/10.1007/s11434-016-1145-4. https://www.osti.gov/servlets/purl/1336200.
@article{osti_1336200,
title = {Nodeless pairing in superconducting copper-oxide monolayer films on Bi2Sr2CaCu2O8+δ},
author = {Zhong, Yong and Wang, Yang and Han, Sha and Lv, Yan-Feng and Wang, Wen-Lin and Zhang, Ding and Ding, Hao and Zhang, Yi-Min and Wang, Lili and He, Ke and Zhong, Ruidan and Schneeloch, John A. and Gu, Gen-Da and Song, Can-Li and Ma, Xu-Cun and Xue, Qi-Kun},
abstractNote = {We report that the pairing mechanism of high-temperature superconductivity in cuprates remains the biggest unresolved mystery in condensed matter physics. To solve the problem, one of the most effective approaches is to investigate directly the superconducting CuO2 layers. Here, by growing CuO2 monolayer films on Bi2Sr2CaCu2O8+δ substrates, we identify two distinct and spatially separated energy gaps centered at the Fermi energy, a smaller U-like gap and a larger V-like gap on the films, and study their interactions with alien atoms by low-temperature scanning tunneling microscopy. The newly discovered U-like gap exhibits strong phase coherence and is immune to scattering by K, Cs and Ag atoms, suggesting its nature as a nodeless superconducting gap in the CuO2 layers, whereas the V-like gap agrees with the well-known pseudogap state in the underdoped regime. In conclusion, our results support an s-wave superconductivity in Bi2Sr2CaCu2O8+δ, which, we propose, originates from the modulation-doping resultant two-dimensional hole liquid confined in the CuO2 layers.},
doi = {10.1007/s11434-016-1145-4},
journal = {Science Bulletin},
number = 16,
volume = 61,
place = {United States},
year = {Tue Jul 12 00:00:00 EDT 2016},
month = {Tue Jul 12 00:00:00 EDT 2016}
}
Web of Science
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