Effect of pressure and Ir substitution in YbRh2Si2

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.

arXiv comment9 pages, 7 figures, accepted for publication in J. Phys.: Condens. Matter

References in corpus (6)

• The break up of heavy electrons at a quantum critical point
• Magnetic-Field Induced Quantum Critical Point in YbRh${}_2$Si${}_2$
• Interplay of disorder and spin fluctuations in the resistivity near a quantum critical point
• Huge Enhancement of Impurity Scattering due to Critical Valence Fluctuations in a Ce-Based Heavy Electron System
• Enhanced Impurity Scattering due to Quantum Critical Fluctuations
• Quantum phase transition in the heavy-fermion compound YbIr${}_2$Si${}_2$

Cited by in corpus (6)

• Metallic Quantum Ferromagnets
• Evidence for a Non-Fermi-Liquid Phase in Ge-Substituted YbRh2Si2
• Single crystal growth of YbRh2Si2 and YbIr2Si2
• Separation of energy scales in undoped YbRh${}_2$Si${}_2$ under hydrostatic pressure
• Magnetization study of the energy scales in YbRh${}_2$Si${}_2$ under chemical pressure
• Effect of chemical substitution and pressure on YbRh2Si2