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Title: Nodeless High- T c Superconductivity in the Highly Overdoped CuO 2 Monolayer

Abstract

We study the electronic structure and superconductivity in a CuO 2 monolayer grown recently on the d-wave cuprate superconductor Bi 2Sr 2CaCu 2O 8+δ. Density functional theory calculations indicate a significant charge transfer across the interface such that the CuO 2 monolayer is heavily overdoped into the hole-rich regime yet inaccessible in bulk cuprates. We show that both the Cu d x2–y2 and d 3z2–r2 orbitals become important and the Fermi surface contains one electron and one hole pocket associated with the two orbitals, respectively. Constructing a minimal correlated two-orbital model for the e g complex, we show that the spin-orbital exchange interactions produce a nodeless superconductor with extended s-wave pairing symmetry and a pairing energy gap comparable to the bulk d-wave gap, in agreement with recent experiments. Here, the findings point to a direction of realizing new high-T c superconductors in ozone grown transition-metal-oxide monolayer heterostructures.

Authors:
 [1];  [2];  [3];  [4]
  1. Boston College, Chestnut Hill, MA (United States); Chinese Academy of Sciences (CAS), Beijing (China)
  2. Chinese Academy of Sciences (CAS), Beijing (China); Julius-Maximilians-Univ. Würzburg (Germany)
  3. Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China); Univ. of Chinese Academy of Sciences, Beijing (China)
  4. Boston College, Chestnut Hill, MA (United States)
Publication Date:
Research Org.:
Boston College, Chestnut Hill, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
OSTI Identifier:
1610432
Alternate Identifier(s):
OSTI ID: 1483921
Grant/Contract Number:  
FG02-99ER45747; PHY-1066293
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 121; Journal Issue: 22; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; physics; impurities in superconductors; superconducting gap; superconducting order parameter; superconducting phase transition; cuprates; high-temperature superconductors; monolayer films; thin films; ultrathin films; density functional calculations; methods in superconductivity

Citation Formats

Jiang, Kun, Wu, Xianxin, Hu, Jiangping, and Wang, Ziqiang. Nodeless High-Tc Superconductivity in the Highly Overdoped CuO2 Monolayer. United States: N. p., 2018. Web. doi:10.1103/physrevlett.121.227002.
Jiang, Kun, Wu, Xianxin, Hu, Jiangping, & Wang, Ziqiang. Nodeless High-Tc Superconductivity in the Highly Overdoped CuO2 Monolayer. United States. https://doi.org/10.1103/physrevlett.121.227002
Jiang, Kun, Wu, Xianxin, Hu, Jiangping, and Wang, Ziqiang. Thu . "Nodeless High-Tc Superconductivity in the Highly Overdoped CuO2 Monolayer". United States. https://doi.org/10.1103/physrevlett.121.227002. https://www.osti.gov/servlets/purl/1610432.
@article{osti_1610432,
title = {Nodeless High-Tc Superconductivity in the Highly Overdoped CuO2 Monolayer},
author = {Jiang, Kun and Wu, Xianxin and Hu, Jiangping and Wang, Ziqiang},
abstractNote = {We study the electronic structure and superconductivity in a CuO2 monolayer grown recently on the d-wave cuprate superconductor Bi2Sr2CaCu2O8+δ. Density functional theory calculations indicate a significant charge transfer across the interface such that the CuO2 monolayer is heavily overdoped into the hole-rich regime yet inaccessible in bulk cuprates. We show that both the Cu dx2–y2 and d3z2–r2 orbitals become important and the Fermi surface contains one electron and one hole pocket associated with the two orbitals, respectively. Constructing a minimal correlated two-orbital model for the eg complex, we show that the spin-orbital exchange interactions produce a nodeless superconductor with extended s-wave pairing symmetry and a pairing energy gap comparable to the bulk d-wave gap, in agreement with recent experiments. Here, the findings point to a direction of realizing new high-Tc superconductors in ozone grown transition-metal-oxide monolayer heterostructures.},
doi = {10.1103/physrevlett.121.227002},
url = {https://www.osti.gov/biblio/1610432}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 22,
volume = 121,
place = {United States},
year = {2018},
month = {11}
}

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Cited by: 4 works
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