Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-10-14
J. Phys.: Condens. Matter 20, 505205 (2008)
Physics
Condensed Matter
Strongly Correlated Electrons
9 pages, 7 figures, accepted for publication in J. Phys.: Condens. Matter
Scientific paper
10.1088/0953-8984/20/50/505205
In this article we present a study of the electrical resistivity of Yb(Rh-xIrx)2Si2, x=0.06, under high pressure and in magnetic field. Ir substitution is expanding the unit cell and leads to a suppression of the antiferromagnetic transition temperature to zero, where eventually a quantum critical point (QCP) exists. We applied hydrostatic pressure to reverse the effect of substitution. Our results indicate that Yb(Rh0.94Ir0.06)2Si2 is situated in the immediate proximity to a volume controlled QCP, but still on the magnetically ordered side of the phase diagram. The temperature - pressure phase diagram of Yb(Rh0.94Ir0.06)2Si2 resembles that of the pure compound. Substitution acts mainly as chemical pressure. Disorder introduced by substitution has only minor effects.
Geibel Ch.
Krellner Cornelius
Macovei M. E.
Nicklas Michael
Steglich Frank
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