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Title: Anomalous doping evolution of nodal dispersion revealed by in situ ARPES on continuously doped cuprates

Abstract

Here, we study the systematic doping evolution of nodal dispersions by in situ angle-resolved photoemission spectroscopy on the continuously doped surface of a high-temperature superconductor Bi 2Sr 2CaCu 2O 8+x and reveal that the nodal dispersion has three fundamentally different segments separated by two kinks, located at ~10 meV and roughly 70 meV, respectively. These three segments have different band velocities and different doping dependence. In particular, in the underdoped region the velocity of the high-energy segment increases monotonically as the doping level decreases and can even surpass the bare band velocity. Finally, we propose that electron fractionalization is a possible cause for this anomalous nodal dispersion and may even play a key role in the understanding of exotic properties of cuprates.

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [1];  [1];  [2];  [2];  [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5]
  1. Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Chinese Academy of Sciences, Beijing (China)
  2. Tsinghua Univ., Beijing (China)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Chinese Academy of Sciences (CAS), Beijing (China); Songshan Lake Materials Lab., Dongguan, Guangdong (China)
  5. Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Chinese Academy of Sciences, Beijing (China); Songshan Lake Materials Lab., Dongguan, Guangdong (China)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1580249
Report Number(s):
BNL-212485-2019-JAAM
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 18; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

Citation Formats

Zhong, Yigui, Guan, Jianyu, Zhao, Jin, Tang, Cenyao, Rao, Zhicheng, Liu, Haijiang, Zhang, Jianhao, Li, Sen, Weng, Zhengyu, Gu, Genda, Sun, Yujie, and Ding, Hong. Anomalous doping evolution of nodal dispersion revealed by in situ ARPES on continuously doped cuprates. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.184504.
Zhong, Yigui, Guan, Jianyu, Zhao, Jin, Tang, Cenyao, Rao, Zhicheng, Liu, Haijiang, Zhang, Jianhao, Li, Sen, Weng, Zhengyu, Gu, Genda, Sun, Yujie, & Ding, Hong. Anomalous doping evolution of nodal dispersion revealed by in situ ARPES on continuously doped cuprates. United States. doi:10.1103/PhysRevB.100.184504.
Zhong, Yigui, Guan, Jianyu, Zhao, Jin, Tang, Cenyao, Rao, Zhicheng, Liu, Haijiang, Zhang, Jianhao, Li, Sen, Weng, Zhengyu, Gu, Genda, Sun, Yujie, and Ding, Hong. Tue . "Anomalous doping evolution of nodal dispersion revealed by in situ ARPES on continuously doped cuprates". United States. doi:10.1103/PhysRevB.100.184504.
@article{osti_1580249,
title = {Anomalous doping evolution of nodal dispersion revealed by in situ ARPES on continuously doped cuprates},
author = {Zhong, Yigui and Guan, Jianyu and Zhao, Jin and Tang, Cenyao and Rao, Zhicheng and Liu, Haijiang and Zhang, Jianhao and Li, Sen and Weng, Zhengyu and Gu, Genda and Sun, Yujie and Ding, Hong},
abstractNote = {Here, we study the systematic doping evolution of nodal dispersions by in situ angle-resolved photoemission spectroscopy on the continuously doped surface of a high-temperature superconductor Bi2Sr2CaCu2O8+x and reveal that the nodal dispersion has three fundamentally different segments separated by two kinks, located at ~10 meV and roughly 70 meV, respectively. These three segments have different band velocities and different doping dependence. In particular, in the underdoped region the velocity of the high-energy segment increases monotonically as the doping level decreases and can even surpass the bare band velocity. Finally, we propose that electron fractionalization is a possible cause for this anomalous nodal dispersion and may even play a key role in the understanding of exotic properties of cuprates.},
doi = {10.1103/PhysRevB.100.184504},
journal = {Physical Review B},
number = 18,
volume = 100,
place = {United States},
year = {2019},
month = {11}
}

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