Superconducting fluctuations--Large Diamagnetism of Low $T_c$ Nanoparticles

Abstract

It is shown that nanoparticles made of low $T_c$ superconductors have large diamagnetic response at temperatures several orders of magnitude above $T_c$. Most features of the recently observed Giant diamagnetism of Au nanorods are explained in terms of superconducting fluctuations, except for the huge magnitude of the effect.

arXiv comment4 pages, to appear in Phys Rev B

References in corpus (7)

• Direct evidence for ferromagnetic spin polarization in gold nanoparticles
• Effect of pair-breaking on mesoscopic persistent currents well above the superconducting transition temperature
• Observation of magnetism in Au thin films
• Pair-breaking effect on mesoscopic persistent currents
• Limitations on the Ginzburg criterion for dirty superconductors
• Scale-dependent competing interactions: sign reversal of the average persistent current
• Renormalization of competing interactions and superconductivity on small scales

Cited by in corpus (2)

• Orbital magnetism in ensembles of gold nanoparticles
• Spontaneous orbital magnetization of mesoscopic dipole dimers