Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2002-12-11
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 3 figures; accepted for publication in Phys. Rev. B (Rapid Communication) and scheduled issue on 1st of May 2003
Scientific paper
10.1103/PhysRevB.67.180407
The magnetic properties of CeRu$_2$Si$_2$ at microkelvin temperatures (down to 170 $\mu$K) and ultra small magnetic fields ($0.02\sim6.21$ mT) are investigated experimentally for the first time. The simultaneously measured ac susceptibility and static magnetization show neither evidence of the magnetic ordering, superconductivity down to the lowest temperatures nor conventional Landau Fermi-Liquid behavior. The results imply the magnetic transition temperature in undoped CeRu$_2$Si$_2$ is very close to absolute 0 K. The possibility for proximity of CeRu$_2$Si$_2$ to the quantum critical point without any doping is discussed.
Abe Sumiyoshi
Matsumoto Katsumi
Mizuno Hideki
Onuki Yoshichika
Suzuki Hiroshi
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