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

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

doi:10.1088/0256-307X/35/1/017401

Title: Temperature Evolution of Energy Gap and Band Structure in the Superconducting and Pseudogap States of Bi₂Sr₂CaCu₂O_8+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 Bi₂Sr₂CaCu₂O_8+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 (T_c=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 Bi₂Sr₂CuO_6+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:

Sun, Xuan ^[1]; Zhang, Wen-Tao ^[2]; Zhao, Lin ^[2]; Liu, Guo-Dong ^[2];

^[3]; Peng, Qin-Jun ^[4]; Wang, Zhi-Min ^[4]; Zhang, Shen-Jin ^[4]; Yang, Feng ^[4]; Chen, Chuang-Tian ^[4]; Xu, Zu-Yan ^[4]; Zhou, Xing-Jiang ^[5]

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:: Sun Dec 17 00:00:00 EST 2017

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.

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                    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

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                    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.

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@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         = {Sun Dec 17 00:00:00 EST 2017},

  month        = {Sun Dec 17 00:00:00 EST 2017}

}

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Cited by: 8 works

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Figures / Tables:

FIG. 1: Fermi surface and band structure of optimally-doped Bi2212 (T_c =91 K) measured by laser ARPES at 15 K. (a). Spectral weight as a function of two-dimensional momentum (k_x,k_y) integrated over [-1meV,1meV] energy window with respect to the Fermi level E_F . The antibonding and bonding Fermi surface sheetsmore »

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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

Abstract

Citation Formats

Figures / Tables:

Title: Temperature Evolution of Energy Gap and Band Structure in the Superconducting and Pseudogap States of Bi₂Sr₂CaCu₂O_8+δ Superconductor Revealed by Laser-Based Angle-Resolved Photoemission Spectroscopy