Abstract
What factors fundamentally determine the value of superconducting transition temperature Tc in high tem-perature 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 supercon-ductors 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.We highlight that the Tc values are strongly linked to the joint response factors of magnetic field and electric field,i.e.,ρs and a,respectively,implying that the physics determining Tc is governed by the intrinsic electromagnetic fields of the system.
基金项目
国家重点研发计划(2021YFA1401800)
国家重点研发计划(2022YFA1403900)
国家自然科学基金(U2032214)
国家自然科学基金(12122414)
国家自然科学基金(12104487)
国家自然科学基金(12004419)
中国科学院战略规划重点项目(B类)(XDB25000000)
US Department of Energy,Office of Basic Energy Sciences(DOE-sc0012704)
维普
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