Anomaly in the Tunneling I(V) Characteristics of Bi2212

TL;DR

This paper reports an anomaly in the tunneling I(V) characteristics of Bi2212 superconductors, attributed to the superconducting condensate, revealing one-dimensionality and constraining theories of high-T_c superconductivity.

Contribution

It identifies a novel anomaly in tunneling data linked to the superconducting condensate, providing new insights into the dimensionality and theoretical understanding of high-T_c materials.

Findings

Anomaly caused by the superconducting condensate

Presence of one-dimensionality in Bi2212

Constraints on high-T_c superconductivity theories

Abstract

Tunneling measurements have been carried out on slightly overdoped Bi2212 single crystals below and above the critical temperature by break-junctions and in-plane point-contacts. An anomaly was found in the tunneling I(V) characteristics. Analysis of the data shows that the anomaly is caused by the superconducting condensate. In the extracted I(V) characteristics of the condensate, the constant asymptotics points to the presence of one-dimensionality in Bi2212. The anomaly found here puts additional constraints on the final theory of high-T_c superconductivity.