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Title: Quantitative Characterization of the Nanoscale Local Lattice Strain Induced by Sr Dopants in La 1.92 Sr 0.08 CuO 4

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [4];  [5];  [6];  [7]
  1. Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Chinese Academy of Science, Beijing (China)
  2. Chinese Academy of Sciences (CAS), Beijing (China); ShanghaiTech Univ., Shanghai (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  3. Univ. of Birmingham, Birmingham (United Kingdom)
  4. Japan Atomic Energy Agency, Ibaraki (Japan)
  5. Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Chinese Academy of Science, Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  6. Argonne National Lab. (ANL), Argonne, IL (United States)
  7. Univ. of California, San Diego, La Jolla, CA (United States)

Here, the nanometer scale lattice deformation brought about by the dopants in the high temperature superconducting cuprate La2-xSrxCuO4 (x = 0.08) was investigated by measuring the associated x-ray diffuse scattering around multiple Bragg peaks. A characteristic diffuse scattering pattern was observed, which can be well described by continuum elastic theory. With the fitted dipole force parameters, the acoustic-type lattice deformation pattern was reconstructed and found to be of similar size to lattice thermal vibration at 7 K. Our results address the long-term concern of dopant introduced local lattice inhomogeneity, and show that the associated nanometer scale lattice deformation is marginal and cannot, alone, be responsible for the patched variation in the spectral gaps observed with scanning tunneling microscopy in the cuprates.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357; SC0003678
OSTI ID:
1461419
Alternate ID(s):
OSTI ID: 1436900
Journal Information:
Physical Review Letters, Vol. 120, Issue 19; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

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Figures / Tables (4)


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