Unscaling Superconducting Parameters with $T_c$ for Bi-2212 and Bi-2223: A Magnetotransport Study in the Superconductive Fluctuation Regime

TL;DR

This study investigates the relationship between superconducting parameters and critical temperature in Bi-2212 and Bi-2223, revealing an additional condensation energy linked to the number of CuO$_{2}$ planes.

Contribution

It provides a systematic magnetotransport analysis and estimates key superconducting parameters, offering new insights into the role of CuO$_{2}$ planes in high-$T_c$ cuprates.

Findings

Superconducting parameters scale with $T_c$ in these compounds.

An additional condensation energy correlates with the number of CuO$_{2}$ planes.

Doping dependence explained via Fermi arc approach.

Abstract

To investigate the origin of the enhanced $T_c$ ($\approx$ 110 K) of the trilayer cuprate superconductor Bi$_{2}$Sr$_{2}$Ca$_{2}$Cu$_{3}$O$_{10+\delta}$ (Bi-2223), we have performed systematic magnetoresistance (MR) measurements on this superconductor, as well as on the bilayer superconductor, Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$ (Bi-2212). The in-plane coherence length, $\xi_{ab}$, and the specific-heat jump, ${\Delta}C$, have been estimated using the theory of renormalized superconductive fluctuations, and the doping dependence of these parameters has been qualitatively explained using the Fermi arc approach. A detailed comparison of the superconducting parameters with $T_c$ for these compounds suggests that an additional superconducting condensation energy exists, due to an increase in the number of stacking CuO$_{2}$ planes in a unit cell.