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Title: Evolution of Superconducting-Transition Temperature with Superfluid Density and Conductivity in Pressurized Cuprate Superconductors

Journal Article · · Chinese Physics Letters
 [1];  [2];  [1];  [3];  [4];  [4];  [1];  [1];  [4];  [4];  [4];  [4];  [4];  [1];  [2];  [5];  [2];  [6]
  1. Chinese Academy of Sciences (CAS), Beijing (China); University of Chinese Academy of Sciences, Beijing (China)
  2. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing (China)
  3. Brookhaven National Laboratory (BNL), Upton, NY (United States)
  4. Chinese Academy of Sciences (CAS), Beijing (China)
  5. Chinese Academy of Sciences (CAS), Beijing (China); University of Chinese Academy of Sciences, Beijing (China); Beijing Academy of Quantum Information Sciences (China)
  6. Chinese Academy of Sciences (CAS), Beijing (China); Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing (China); University of Chinese Academy of Sciences, Beijing (China)

What factors fundamentally determine the value of superconducting transition temperature Tc in high temperature superconductors has been the subject of intense debate. Following the establishment of an empirical law known as Homes' law, there is a growing consensus in the community that the Tc value of the cuprate superconductors is closely linked to the superfluid density (ρs) of its ground state and the conductivity (σ) of its normal state. However, all the data supporting this empirical law (ρs = AσTc) have been obtained from the ambient-pressure superconductors. In this study, we present the first high-pressure results about the connection of the quantities of ρs and σ with Tc, through the studies on the Bi1.74Pb0.38Sr1.88CuO6+δ and Bi2Sr2CaCu2O8+δ, in which the value of their high-pressure resistivity (ρ = 1/σ) is achieved by adopting our newly established method, while the quantity of ρs is extracted using Homes' law. In conclusion, we highlight that the Tc values are strongly linked to the joint response factors of magnetic field and electric field, i.e., ρs and σ, respectively, implying that the physics determining Tc is governed by the intrinsic electromagnetic fields of the system.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
SC0012704
OSTI ID:
2367438
Report Number(s):
BNL--225633-2024-JAAM
Journal Information:
Chinese Physics Letters, Journal Name: Chinese Physics Letters Journal Issue: 4 Vol. 41; ISSN 0256-307X
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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