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Title: Electronic structure of the ingredient planes of the cuprate superconductor Bi2Sr2CuO6+δ: A comparison study with Bi2Sr2CaCu2O8+δ

Abstract

By means of low-temperature scanning tunneling microscopy, we report on the electronic structures of the BiO and SrO planes of the Bi2Sr2CuO6+δ (Bi-2201) superconductor prepared by argon-ion bombardment and annealing. Depending on post annealing conditions, the BiO planes exhibit either a pseudogap (PG) with sharp coherence peaks and an anomalously large gap magnitude of 49 meV or van Hove singularity (vHS) near the Fermi level, while the SrO is always characteristic of a PG-like feature. This contrasts with the Bi2Sr2CaCu2O8+δ (Bi-2212) superconductor where vHS occurs solely on the SrO plane. We disclose the interstitial oxygen dopants (δ in the formulas) as a primary cause for the occurrence of vHS, which are located dominantly around the BiO and SrO planes, respectively, in Bi-2201 and Bi-2212. This is supported by the contrasting structural buckling amplitude of the BiO and SrO planes in the two superconductors. Furthermore, our findings provide solid evidence for the irrelevance of PG to the superconductivity in the two superconductors, as well as insights into why Bi-2212 can achieve a higher superconducting transition temperature than Bi-2201, and by implication, the mechanism of cuprate superconductivity.

Authors:
;  [1];  [2];  [2];  [2];  [3];  [1];  [1];  [4];  [4];  [4];  [3];  [5];  [4];  [4];  [4]
+ Show Author Affiliations
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Tsinghua Univ., Beijing (China)
  3. Chinese Academy of Sciences, Beijing (China)
  4. Tsinghua Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  5. Chinese Academy of Sciences, Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
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:
1263913
Alternate Identifier(s):
OSTI ID: 1247824
Report Number(s):
BNL-112335-2016-JA
Journal ID: ISSN 2469-9950; R&D Project: PO010; KC0201060
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 14; 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

Citation Formats

Yan -Feng Lv, Gu, G. D., Wang, Wen -Lin, Ding, Hao, Wang, Yang, Ding, Ying, Zhong, Ruidan, Schneeloch, John, Wang, Lili, He, Ke, Ji, Shuai -Hua, Zhao, Lin, Zhou, Xing -Jiang, Song, Can -Li, Ma, Xu -Cun, and Xue, Qi -Kun. Electronic structure of the ingredient planes of the cuprate superconductor Bi2Sr2CuO6+δ: A comparison study with Bi2Sr2CaCu2O8+δ. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.140504.
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Yan -Feng Lv, Gu, G. D., Wang, Wen -Lin, Ding, Hao, Wang, Yang, Ding, Ying, Zhong, Ruidan, Schneeloch, John, Wang, Lili, He, Ke, Ji, Shuai -Hua, Zhao, Lin, Zhou, Xing -Jiang, Song, Can -Li, Ma, Xu -Cun, & Xue, Qi -Kun. Electronic structure of the ingredient planes of the cuprate superconductor Bi2Sr2CuO6+δ: A comparison study with Bi2Sr2CaCu2O8+δ. United States. https://doi.org/10.1103/PhysRevB.93.140504
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Yan -Feng Lv, Gu, G. D., Wang, Wen -Lin, Ding, Hao, Wang, Yang, Ding, Ying, Zhong, Ruidan, Schneeloch, John, Wang, Lili, He, Ke, Ji, Shuai -Hua, Zhao, Lin, Zhou, Xing -Jiang, Song, Can -Li, Ma, Xu -Cun, and Xue, Qi -Kun. Fri . "Electronic structure of the ingredient planes of the cuprate superconductor Bi2Sr2CuO6+δ: A comparison study with Bi2Sr2CaCu2O8+δ". United States. https://doi.org/10.1103/PhysRevB.93.140504. https://www.osti.gov/servlets/purl/1263913.
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@article{osti_1263913,
title = {Electronic structure of the ingredient planes of the cuprate superconductor Bi2Sr2CuO6+δ: A comparison study with Bi2Sr2CaCu2O8+δ},
author = {Yan -Feng Lv and Gu, G. D. and Wang, Wen -Lin and Ding, Hao and Wang, Yang and Ding, Ying and Zhong, Ruidan and Schneeloch, John and Wang, Lili and He, Ke and Ji, Shuai -Hua and Zhao, Lin and Zhou, Xing -Jiang and Song, Can -Li and Ma, Xu -Cun and Xue, Qi -Kun},
abstractNote = {By means of low-temperature scanning tunneling microscopy, we report on the electronic structures of the BiO and SrO planes of the Bi2Sr2CuO6+δ (Bi-2201) superconductor prepared by argon-ion bombardment and annealing. Depending on post annealing conditions, the BiO planes exhibit either a pseudogap (PG) with sharp coherence peaks and an anomalously large gap magnitude of 49 meV or van Hove singularity (vHS) near the Fermi level, while the SrO is always characteristic of a PG-like feature. This contrasts with the Bi2Sr2CaCu2O8+δ (Bi-2212) superconductor where vHS occurs solely on the SrO plane. We disclose the interstitial oxygen dopants (δ in the formulas) as a primary cause for the occurrence of vHS, which are located dominantly around the BiO and SrO planes, respectively, in Bi-2201 and Bi-2212. This is supported by the contrasting structural buckling amplitude of the BiO and SrO planes in the two superconductors. Furthermore, our findings provide solid evidence for the irrelevance of PG to the superconductivity in the two superconductors, as well as insights into why Bi-2212 can achieve a higher superconducting transition temperature than Bi-2201, and by implication, the mechanism of cuprate superconductivity.},
doi = {10.1103/PhysRevB.93.140504},
journal = {Physical Review B},
number = 14,
volume = 93,
place = {United States},
year = {2016},
month = {4}
}
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https://doi.org/10.1103/PhysRevB.93.140504
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    Atomic visualization of copper oxide structure in the infinite-layer cuprate SrCu O 2
    journal, June 2018

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