Single crystal growth of YbRh2Si2 and YbIr2Si2

  • Krellner C
  • Taube S
  • Westerkamp T
 et al. 
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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 (ρ0 ≈ 0.5 µΩ cm) 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(Rh1−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.

Author-supplied keywords

  • kondo-lattice systems
  • metal-flux technique
  • quantum
  • ybir 2 si 2
  • ybir2si2
  • ybrh 2 si 2
  • ybrh2si2

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  • Cornelius Krellner

  • Sebastian Taube

  • Tanja Westerkamp

  • Zakir Hossain

  • Christoph Geibel

  • United Kingdom

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