Quasiparticle scattering in superconductors
Zdenek Janu, Frantisek Soukup, Rudolf Tichy, Georgy Tsoi, Jan Hadac, and Jana Vejpravova
TL;DR
This paper compares magnetic susceptibility measurements across different superconductors, revealing detailed transition behaviors and suggesting electron-lattice interactions influence superconducting properties.
Contribution
It provides a comparative analysis of flux measurements in various superconductors, highlighting anomalous features in La similar to high-temperature superconductors.
Findings
Pb conforms to BCS predictions
La shows anomalous transition features
Electron-lattice instability may cause resonance scattering
Abstract
We compare results of high-resolution magnetic flux (susceptibility) measurements in very weak magnetic field, performed of three classes of superconductors. They reveal astonishing details of the transition to the superconducting state. Although Pb behaves also on this scale according to BCS predictions, La is more reminiscent of HTS materials, which exhibit anomalous features. We suggest that known structure peculiarities are due to a strong electron-lattice instability and lead to a resonance electron back scattering.
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