TY - JOUR
T1 - Spin and valence-fluctuation mediated superconductivity in pressurised Fe and CeCu2(Si/Ge)2
AU - Jaccard, D.
AU - Holmes, A.T.
PY - 2005/4/30
Y1 - 2005/4/30
N2 - We review the evidence supporting valence-fluctuation-mediated superconductivity in CeCuSi and CeCuGe , where T reaches 2.4 K at high pressure. In these systems the valence and magnetic critical points, at p and p , respectively, are well separated. Characteristic signatures associated with both are distinct. In contrast, the valence and spin fluctuation regions appear much closer in most Ce-based compounds. Concerning d-transition metals, superconductivity in pure iron emerges in the pressure window 15-30 GPa with the onset of T up to almost 3 K. All relevant observations point to unconventional superconductivity, likely mediated by ferromagnetic spin fluctuations.
AB - We review the evidence supporting valence-fluctuation-mediated superconductivity in CeCuSi and CeCuGe , where T reaches 2.4 K at high pressure. In these systems the valence and magnetic critical points, at p and p , respectively, are well separated. Characteristic signatures associated with both are distinct. In contrast, the valence and spin fluctuation regions appear much closer in most Ce-based compounds. Concerning d-transition metals, superconductivity in pure iron emerges in the pressure window 15-30 GPa with the onset of T up to almost 3 K. All relevant observations point to unconventional superconductivity, likely mediated by ferromagnetic spin fluctuations.
UR - http://dx.doi.org/10.1016/j.physb.2005.01.056
U2 - 10.1016/j.physb.2005.01.056
DO - 10.1016/j.physb.2005.01.056
M3 - Article
AN - SCOPUS:18244389954
SN - 0921-4526
VL - 359-361
SP - 333
EP - 340
JO - Physica B - Physics of Condensed Matter
JF - Physica B - Physics of Condensed Matter
IS - SPEC. ISS.
ER -