Temperature Evolution of Energy Gap and Band Structure in the Superconducting and Pseudogap States of Bi2Sr2CaCu2O8+δ Superconductor Revealed by Laser-Based Angle-Resolved Photoemission Spectroscopy
Abstract
For this study, we carry out detailed momentum-dependent and temperature-dependent measurements on Bi2Sr2CaCu2O8+δ (Bi2212) superconductor in the superconducting and pseudogap states by super-high resolution laser-based angle-resolved photoemission spectroscopy. The precise determination of the superconducting gap for the nearly optimally doped Bi2212 (Tc=91 K) at low temperature indicates that the momentum-dependence of the superconducting gap deviates from the standard d-wave form (cos(2Φ)). It can be alternatively fitted by including a high-order term (cos(6Φ)) in which the next nearest-neighbor interaction is considered. We find that the band structure near the antinodal region smoothly evolves across the pseudogap temperature without a signature of band reorganization which is distinct from that found in Bi2Sr2CuO6+δ superconductors. This indicates that the band reorganization across the pseudogap temperature is not a universal behavior in cuprate superconductors. These results provide new insights in understanding the nature of the superconducting gap and pseudogap in high-temperature cuprate superconductors.
- Authors:
-
- Univ. of Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics and National Lab. for Superconductivity
- Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics and National Lab. for Superconductivity
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics
- Chinese Academy of Sciences (CAS), Beijing (China). Technical Inst. of Physics and Chemistry
- Univ. of Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics and National Lab. for Superconductivity; Collaborative Innovation Center of Quantum Matter (CICQM), Beijing (China)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); National Basic Research Program of China; Chinese Academy of Sciences
- OSTI Identifier:
- 1430861
- Report Number(s):
- BNL-203394-2018-JAAM
Journal ID: ISSN 0256-307X
- Grant/Contract Number:
- SC0012704; 2016YFA0300300; 11334010; 2015CB921300; XDB07020300
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Chinese Physics Letters
- Additional Journal Information:
- Journal Volume: 35; Journal Issue: 1; Journal ID: ISSN 0256-307X
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Sun, Xuan, Zhang, Wen-Tao, Zhao, Lin, Liu, Guo-Dong, Gu, Gen-Da, Peng, Qin-Jun, Wang, Zhi-Min, Zhang, Shen-Jin, Yang, Feng, Chen, Chuang-Tian, Xu, Zu-Yan, and Zhou, Xing-Jiang. Temperature Evolution of Energy Gap and Band Structure in the Superconducting and Pseudogap States of Bi2Sr2CaCu2O8+δ Superconductor Revealed by Laser-Based Angle-Resolved Photoemission Spectroscopy. United States: N. p., 2017.
Web. doi:10.1088/0256-307X/35/1/017401.
Sun, Xuan, Zhang, Wen-Tao, Zhao, Lin, Liu, Guo-Dong, Gu, Gen-Da, Peng, Qin-Jun, Wang, Zhi-Min, Zhang, Shen-Jin, Yang, Feng, Chen, Chuang-Tian, Xu, Zu-Yan, & Zhou, Xing-Jiang. Temperature Evolution of Energy Gap and Band Structure in the Superconducting and Pseudogap States of Bi2Sr2CaCu2O8+δ Superconductor Revealed by Laser-Based Angle-Resolved Photoemission Spectroscopy. United States. https://doi.org/10.1088/0256-307X/35/1/017401
Sun, Xuan, Zhang, Wen-Tao, Zhao, Lin, Liu, Guo-Dong, Gu, Gen-Da, Peng, Qin-Jun, Wang, Zhi-Min, Zhang, Shen-Jin, Yang, Feng, Chen, Chuang-Tian, Xu, Zu-Yan, and Zhou, Xing-Jiang. Sun .
"Temperature Evolution of Energy Gap and Band Structure in the Superconducting and Pseudogap States of Bi2Sr2CaCu2O8+δ Superconductor Revealed by Laser-Based Angle-Resolved Photoemission Spectroscopy". United States. https://doi.org/10.1088/0256-307X/35/1/017401. https://www.osti.gov/servlets/purl/1430861.
@article{osti_1430861,
title = {Temperature Evolution of Energy Gap and Band Structure in the Superconducting and Pseudogap States of Bi2Sr2CaCu2O8+δ Superconductor Revealed by Laser-Based Angle-Resolved Photoemission Spectroscopy},
author = {Sun, Xuan and Zhang, Wen-Tao and Zhao, Lin and Liu, Guo-Dong and Gu, Gen-Da and Peng, Qin-Jun and Wang, Zhi-Min and Zhang, Shen-Jin and Yang, Feng and Chen, Chuang-Tian and Xu, Zu-Yan and Zhou, Xing-Jiang},
abstractNote = {For this study, we carry out detailed momentum-dependent and temperature-dependent measurements on Bi2Sr2CaCu2O8+δ (Bi2212) superconductor in the superconducting and pseudogap states by super-high resolution laser-based angle-resolved photoemission spectroscopy. The precise determination of the superconducting gap for the nearly optimally doped Bi2212 (Tc=91 K) at low temperature indicates that the momentum-dependence of the superconducting gap deviates from the standard d-wave form (cos(2Φ)). It can be alternatively fitted by including a high-order term (cos(6Φ)) in which the next nearest-neighbor interaction is considered. We find that the band structure near the antinodal region smoothly evolves across the pseudogap temperature without a signature of band reorganization which is distinct from that found in Bi2Sr2CuO6+δ superconductors. This indicates that the band reorganization across the pseudogap temperature is not a universal behavior in cuprate superconductors. These results provide new insights in understanding the nature of the superconducting gap and pseudogap in high-temperature cuprate superconductors.},
doi = {10.1088/0256-307X/35/1/017401},
journal = {Chinese Physics Letters},
number = 1,
volume = 35,
place = {United States},
year = {2017},
month = {12}
}
Web of Science
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