Year: 1979
Type: article
Abstract: A comparison was made between four low-temperature properties of La${\mathrm{Cu}}_{2}$${\mathrm{Si}}_{2}$ and Ce${\mathrm{Cu}}_{2}$${\mathrm{Si}}_{2}$. Whereas La${\mathrm{Cu}}_{2}$${\mathrm{Si}}_{2}$ behaves like a normal metal, Ce${\mathrm{Cu}}_{2}$${\mathrm{Si}}_{2}$ shows (i) low-temperature anomalies typical of "unstable $4f$ shell" behavior and (ii) a transition into a superconducting state at ${T}_{c}\ensuremath{\simeq}0.5$ K. Our experiments demonstrate for the first time that superconductivity can exist in a metal in which many-body interactions, probably magnetic in origin, have strongly renormalized the properties of the conduction-electron gas.
Source: Physical Review Letters
Authors: F. Steglich, J. Aarts, C. D. Bredl, W. Lieke, D. Meschede, W. Franz, H. Schäfer
Institutions: Technische Universität Darmstadt, University of Cologne
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: U.S. Department of Energy
OpenAlex ID: W2074040395