Comment on "Orbital Paramagnetism of Electrons in Proximity to a Superconductor"

Abstract

In a recent letter [Phys. Rev. Lett. 80, 5782 (1998)], Bruder and Imry address the reentrance effect in proximity coupled normal-metal coated superconducting cylinders discovered by Mota et al. and challenging theoretical understanding to date. At stake is the explanation of a low-temperature paramagnetic reentrance of order unity. The authors claim to find a `significant paramagnetic effect' which they strongly relate to the layout and findings of the experiment. Here, we show that the straightforward calculation of the paramagnetic change in the susceptibility along the lines of their analysis is by several orders of magnitude smaller than experimentally observed.

1 page, submitted to PRL

References in corpus (1)

• Diamagnetic Response of an N-S-Proximity System at Arbitrary Impurity Concentration

Cited by in corpus (5)

• Paramagnetic instability at normal-metal - superconductor interfaces
• Paramagnetic reentrant effect in high purity mesoscopic AgNb proximity structures
• Proximity-induced screening and its magnetic breakdown in mesoscopic hybrid structures
• Ring--Shaped Andreev Billiards in Quantizing Magnetic Fields
• Rough Surface Effect on Meissner Diamagnetism in Normal-layer of N-S Proximity-Contact System