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Title: Nanoscale interplay of strain and doping in a high-temperature superconductor

The highest temperature superconductors are electronically inhomogeneous at the nanoscale, suggesting the existence of a local variable which could be harnessed to enhance the superconducting pairing. Here we report the relationship between local doping and local strain in the cuprate superconductor Bi₂Sr₂CaCu₂O₈₊x. We use scanning tunneling microscopy to discover that the crucial oxygen dopants are periodically distributed, in correlation with local strain. Our picoscale investigation of the intra-unit-cell positions of all oxygen dopants provides essential structural input for a complete microscopic theory.
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [4] ;  [6] ;  [2] ;  [2] ;  [7] ;  [8] ;  [8] ;  [4]
  1. Harvard Univ., Cambridge, MA (United States); Boston College, Chestnut Hills, MA (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Tampere Univ. of Technology (Finland); Northeastern Univ., Boston, MA (United States)
  4. Harvard Univ., Cambridge, MA (United States)
  5. National Tsing Hua Univ., Hsinchu (Taiwan)
  6. National Tsing Hua Univ., Hsinchu (Taiwan); Academia Sinica, Taipei (Taiwan)
  7. Academia Sinica, Taipei (Taiwan); Northeastern Univ., Boston, MA (United States)
  8. Northeastern Univ., Boston, MA (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 1530-6984; R&D Project: PO010; KC0201060
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 14; Journal Issue: 12; Journal ID: ISSN 1530-6984
American Chemical Society
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY High-Tc; superconductors; cuprates; Bi2Sr2CaCu2O8+x; strain; scanning tunneling microscopy