Effect of pressure and Ir substitution in YbRh2Si2

M. E. Macovei; M. Nicklas; C. Krellner; C. Geibel; F. Steglich

doi:10.1088/0953-8984/20/50/505205

Effect of pressure and Ir substitution in YbRh2Si2

Strongly Correlated Electrons 2008-11-10 v1

Authors: M. E. Macovei , M. Nicklas , C. Krellner , C. Geibel , F. Steglich

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Abstract

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.

Keywords

heavy fermion quantum critical point hydrostatic pressure chemical pressure antiferromagnetic transition electrical resistivity YbRh2Si2

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@article{arxiv.0810.2471,
  title  = {Effect of pressure and Ir substitution in YbRh2Si2},
  author = {M. E. Macovei and M. Nicklas and C. Krellner and C. Geibel and F. Steglich},
  journal= {arXiv preprint arXiv:0810.2471},
  year   = {2008}
}

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9 pages, 7 figures, accepted for publication in J. Phys.: Condens. Matter

Effect of pressure and Ir substitution in YbRh2Si2

Abstract

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