Single crystal growth of YbRh2Si2 and YbIr2Si2

Abstract

We report on the single crystal growth of the heavy-fermion compounds YbRh2Si2 and YbIr2Si2 using a high-temperature indium-flux technique. The optimization of the initial composition and the temperature-time profile lead to large (up to 100 mg) and clean (ρ_0=0.5 μΩcm) single crystals of YbRh2Si2. Low-temperature resistivity measurements revealed a sample dependent temperature exponent below 10 K, which for the samples with highest quality deviates from a linear-in-T behaviour. Furthermore, we grew single crystals of the alloy series Yb(Rh_(1-x)Ir_x)2Si2 with 0<x<0.23 and report the structural details. For pure YbIr2Si2, we establish the formation of two crystallographic modifications, where the magnetic 4f-electrons have different physical ground states.

Invited paper for the Symposium on `Design, Discovery and Growth of Novel Materials' in the Philosophical Magazine

References in corpus (6)

• Fermi-surface collapse and dynamical scaling near a quantum critical point
• Energy scales of Lu(1-x)Yb(x)Rh2Si2 by means of thermopower investigations
• Evolution of magnetism in Yb(Rh_(1-x)Co_x)2Si2
• Violation of critical universality at the antiferromagnetic phase transition of YbRh2Si2
• Quantum phase transition in the heavy-fermion compound YbIr${}_2$Si${}_2$
• Effect of pressure and Ir substitution in YbRh2Si2

Cited by in corpus (16)

• Emergence of superconductivity in the canonical heavy-electron metal YbRh2Si2
• Singular charge fluctuations at a magnetic quantum critical point
• Superconductivity in an extreme strange metal
• Similar temperature scale for valence changes in Kondo lattices with different Kondo temperatures
• Single crystal growth and characterization of GdRh${}_2$Si${}_2$
• Interplay between unconventional superconductivity and heavy-fermion quantum criticality: CeCu${}_2$Si${}_2$ versus YbRh${}_2$Si${}_2$
• Critical slowing down of fermions near a magnetic quantum phase transition
• Magnetization study of the energy scales in YbRh${}_2$Si${}_2$ under chemical pressure
• Electro-nuclear transition into a spatially modulated magnetic state in YbRh${}_2$Si${}_2$
• Microstructuring YbRh2Si2 for resistance and noise measurements down to ultra-low temperatures
• Tuning low-energy scales in YbRh${}_2$Si${}_2$ by non-isoelectronic substitution and pressure
• Effect of symmetry reduction on the magnetic properties of LnIr${}_2$Si${}_2$ polymorphs
• Angle-dependent electron spin resonance of YbRh${}_2$Si${}_2$ measured with planar microwave resonators and in-situ rotation
• Intrinsic defect intolerance in the ultra-pure metal PtSn${}_4$
• Tensile and compressive strain tuning of a Kondo lattice
• Photoemission insights into lanthanide-based crystals