Publications Repository - Gdańsk University of Technology

The crystallographic, electronic transport and thermal properties of Ca2PdGe3 and Ca2PtGe3 are reported. The compounds crystalize in an ordered variant of the AlB2 crystal structure, in space group P6/mmm, with the lattice parameters a = 8.4876(4) Å/8.4503(5) Å and c = 4.1911(3) Å/4.2302(3) Å for Ca2PdGe3 and Ca2PtGe3, respectively. The resistivity data exhibit metallic behavior with residual-resistivity-ratios (RRR) of 13 for Ca2PdGe3 and 6.5 for Ca2PtGe3. No superconducting transition is observed down to 0.4 K. Specific heat studies reveal similar values of the Debye temperatures and Sommerfeld coefficients: Θ_D = 298 K, γ = 4.1 mJ mol−1 K−2 and Θ_D = 305 K, γ = 3.2 mJ mol−1 K−2 for Ca2PdGe3 and Ca2PtGe3, respectively. The low value of γ is in agreement with the electronic structure calculations.

Authors

• prof. dr hab. inż. Tomasz Klimczuk link open in new tab ,
• Weiwei Xie,
• dr inż. Michał Jerzy Winiarski link open in new tab ,
• mgr inż. Robert Kozioł link open in new tab ,
• dr inż. Leszek Litzbarski link open in new tab ,
• Huixia Luo,
• Robert J. Cava