RT Journal Article
T1 The conductivity and the magnetization around Tc in optimally-doped YBa2Cu3O7−δ revisited: quantitative analysis in terms of fluctuating superconducting pairs
A1 Rey, R.I.
A1 Carballeira Romero, Carlos
A1 Doval, J.M.
A1 Mosqueira Rey, Jesús Manuel
A1 Vázquez Ramallo, Manuel
A1 Ramos-Álvarez, A.
A1 Sóñora, D.
A1 Veira Suárez, José Antonio
A1 Verde, J.C.
A1 Vidal Costa, Félix
AB We first present detailed measurements of the rounding behavior around the superconducting transition temperature, Tc, of the in-plane electrical conductivity, magnetoconductivity and magnetization, including the low and moderate magnetic field regimes, in a high-quality single crystal and a thin film of the prototypical optimally-doped YBa2Cu3O7-δ (OPT Y-123), in which the inhomogeneity effects are minimized. Then, we present a comparison of these experimental data with the phenomenological Ginzburg–Landau (GL) approach that takes into account the unavoidable contribution of the fluctuating pairs, the only theoretical scenario that at present allows analysis of these roundings at the quantitative level. These analyses demonstrate that the measured rounding effects around Tc may be explained quantitatively and consistently in terms of the GL scenario, even up to the rounding onset temperatures if the quantum localization, associated with the shrinkage of the superconducting wave function, is taken into account. The implications of our results on the pseudogap physics of optimally-doped cuprates are also discussed.
PB IOP Publishing
YR 2019
FD 2019
LK https://hdl.handle.net/10347/38060
UL https://hdl.handle.net/10347/38060
LA eng
NO R I Rey et al 2019 Supercond. Sci. Technol. 32 045009
NO This is the Accepted Manuscript version of an article accepted for publication in Superconductor Science and Technology.  IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it.  The Version of Record is available online at https://doi.org/10.1088/1361-6668/aafe93
NO This work was supported by project FIS2016-79109-P (AEI/FEDER, UE), Xunta de Galicia (project ED431C 2018/11), Xunta de Galicia and FEDER (network ED431D 2017/06 and strategic aggrupation ED431E 2018/08), and by the CA16218 nanocohybri COST Action. JCV acknowledges financial support from the Spanish Ministry of Education (grant FPU14/00838). We acknowledge S Blanco-Canosa for useful conversations about CDW in OPT Y-123
DS Minerva
RD 27 abr 2026