Work

Mechanism of the Size Dependence of the Superconducting Transition of Nanostructured Nb

Year: 2005

Type: article

Abstract: A direct measurement of the superconducting energy gap by point contact spectroscopy in nanostructured Nb films shows that the gap decreases with a reduction in the average particle size. The superconducting T(c), obtained from transport and magnetic measurements, also decreases with size and scales with the energy gap. The size dependence of the superconducting properties in this intermediate coupling type II superconductor is therefore governed by changes in the electronic density of states rather than by phonon softening. Consistent with the Anderson criterion, no T(c) was observed for sizes below 8 nm.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.95.147003

Authors: Sangita Bose, Pratap Raychaudhuri, Rajarshi Banerjee, Parinda Vasa, Pushan Ayyub

Institutions: Tata Institute of Fundamental Research, University of North Texas

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2043078603

FWCI: 4.732

Cites: 26

Cited by: 154

Related to: 10