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Pressure Tuning of Superconductivity of LaPt4Ge12 and PrPt4Ge12 Single Crystals

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Mydeen,  Kamal
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Leithe-Jasper,  Andreas
Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schnelle,  Walter
Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Lombardi, G. A., Mydeen, K., Gumeniuk, R., Leithe-Jasper, A., Schnelle, W., dos Reis, R. D., et al. (2022). Pressure Tuning of Superconductivity of LaPt4Ge12 and PrPt4Ge12 Single Crystals. Materials, 15(8): 2743, pp. 1-10. doi:10.3390/ma15082743.


Cite as: https://hdl.handle.net/21.11116/0000-000A-9082-F
Abstract
We carried out electrical resistivity and X-ray diffraction (XRD) studies on the filled skutterudite superconductors LaPt4Ge12 and PrPt(4)Ge(12 )under hydrostatic pressure. The superconducting transition temperature T-c is linearly suppressed upon increasing pressure, though the effect of pressure on T-c is rather weak. From the analysis of the XRD data, we obtain bulk moduli of B = 106 GPa and B = 83 GPa for LaPt4Ge12 and PrPt4Ge12, respectively. The knowledge of the bulk modulus allows us to compare the dependence of T-c on the unit-cell volume from our pressure study directly with that found in the substitution series La1-xPrxPt4Ge12. We find that application of hydrostatic pressure can be characterized mainly as a volume effect in LaPt4Ge12 and PrPt4Ge12, while substitution of Pr for La1-xPrxPt4Ge12 yields features going beyond a simple picture.