Comment on "Single intrinsic Josephson junction with double-sided fabrication technique" by You et al [Appl. Phys. Lett. 88, 222501 (2006)]

TL;DR

This paper critically examines a previous claim about the intrinsic properties of Bi2212 Josephson junctions, arguing that their nonlinear IVC features are likely due to extrinsic factors rather than intrinsic junction behavior.

Contribution

It provides a critical analysis challenging the original claim that Bi2212 acts as a series array of SIS junctions with heating-free nonlinear IVCs.

Findings

Original data suggest extrinsic causes for nonlinear IVCs.

The paper questions the validity of the intrinsic junction model.

Highlights discrepancies between claimed and observed data.

Abstract

In a recent letter, henceforth referred to as Ref.[1], You et al postulate that Bi2212 factually represents a series array of SIS junctions and claim that the nonlinear current-voltage characteristics (IVC) of their bridge are free of heating. Earlier experiments cast serious doubt upon the accuracy of the principal postulate (of this letter), see Ref.[2] and references therein. In what follows I will demonstrate that the major claim by the authors of Ref.[1] is at odds with their own data which suggest an extrinsic cause for the IVC nonlinearities.