Superconductivity in Tetragonal LaPt_{2-x}Ge_{2+x}
S. Maeda, K. Matano, H. Sawaoka, Y. Inada, Guo-qing Zheng
TL;DR
This study reports the stabilization of a tetragonal structure in non-stoichiometric LaPt_{2-x}Ge_{2+x} and its superconductivity at higher critical temperatures compared to the monoclinic form.
Contribution
It demonstrates the stabilization of a tetragonal phase in LaPt_{2-x}Ge_{2+x} and reveals enhanced superconducting transition temperatures.
Findings
Tetragonal LaPt_{2-x}Ge_{2+x} can be stabilized in non-stoichiometric form.
Superconductivity observed at Tc=1.85 K and 1.95 K.
Higher Tc compared to monoclinic LaPt_2Ge_2.
Abstract
We find that a tetragonal CaBe_2Ge_2-type structure can be stabilized in non-stoichiometric LaPt_{2-x}Ge_{2+x}. We further discovered that tetragonal LaPt_{2-x}Ge_{2+x} with x=0.15 and 0.2 respectively superconduct at Tc=1.85 K and 1.95 K, which is about four time higher than that in monoclinic LaPt_2Ge_2.
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Taxonomy
TopicsRare-earth and actinide compounds · Iron-based superconductors research · Inorganic Chemistry and Materials