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Title: Lattice Effect on the Superexchange Interaction in Antiferromagnetic Bi2.1Sr1.9CaCu2O8+δ

Journal Article · · Journal of Physical Chemistry. C
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5];  [6];  [3]; ORCiD logo [7];  [3]
  1. Fudan Univ., Shanghai (China); Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China)
  2. Russian Academy of Sciences (RAS), Moscow (Russian Federation). Institute for Nuclear Research and FSRC Crystallography and Photonics; Immanuel Kant Baltic Federal University, Kaliningrad (Russian Federation)
  3. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China)
  4. Brookhaven National Laboratory (BNL), Upton, NY (United States)
  5. Carnegie Inst. of Science, Washington, DC (United States). Earth and Planets Laboratory
  6. Zhejiang Univ., Hangzhou (China)
  7. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China); Harbin Institute of Technology, Shenzhen (China)

By employing Raman scattering and X-ray diffraction techniques on antiferromagnetic Bi2.1Sr1.9CaCu2O8+δ within the same pressure conditions, we tracked the evolution of the two-magnon spectrum and structural parameters under pressures of up to nearly 30 GPa. Consequently, we established the relationship between pressure, in-plane lattice parameter d, and superexchange interaction J as J ~ d-(6.6±0.2). Within the examined pressure range, this compound did not exhibit superconductivity, as determined by a sensitive magnetic measurement technique. Additionally, we observed phonon anomalies, suggesting possible disorder effects in Bi-O layers and reduced charge transfer from these layers, particularly above 10 GPa. Finally, we discuss the impacts of pressure and chemical doping on J and the structure, along with their implications for superconductivity.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA); National Key R&D Program of China; Shenzhen Science and Technology Program; Basic Research Program of Shenzhen
Grant/Contract Number:
SC0012704; AC02-06CH11357
OSTI ID:
2396615
Report Number(s):
BNL--225809-2024-JAAM
Journal Information:
Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 17 Vol. 128; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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