In:
Chinese Physics Letters, IOP Publishing, Vol. 41, No. 4 ( 2024-04-01), p. 047401-
Kurzfassung:
What factors fundamentally determine the value of superconducting transition temperature T c 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 T c value of the cuprate superconductors is closely linked to the superfluid density ( ρ s ) of its ground state and the conductivity ( σ ) of its normal state. However, all the data supporting this empirical law ( ρ s = AσT c ) 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 ρ s and σ with T c , through the studies on the Bi 1.74 Pb 0.38 Sr 1.88 CuO 6+ δ and Bi 2 Sr 2 CaCu 2 O 8+ 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 ρ s is extracted using Homes’ law. We highlight that the T c values are strongly linked to the joint response factors of magnetic field and electric field, i.e., ρ s and σ , respectively, implying that the physics determining T c is governed by the intrinsic electromagnetic fields of the system.
Materialart:
Online-Ressource
ISSN:
0256-307X
,
1741-3540
DOI:
10.1088/0256-307X/41/4/047401
Sprache:
Unbekannt
Verlag:
IOP Publishing
Publikationsdatum:
2024
ZDB Id:
84313-1
ZDB Id:
2040565-0
SSG:
6,25
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