Speaker
Dr
Martin Mansson
(Laboratory for Solid State Physics, ETH Zurich)
Description
The title compound is a recently discovered heavy fermion material where the spacing between Ce-In planes is drastically increased. Consequently, CePt2In7 inherit a truly 2D electronic structure. It was recently discovered that CePt2In7 is not only AF (TN=5.3 K) at ambient pressure but also becomes SC under pressure with a maximum transition temperature Tc=2.1 K at P=3.12 GPa. At lower pressures an intriguing coexistence of the AF order and SC phase is found, and that with increasing pressure Tc is increasing while TN decreases. The growth of the SC on the expense of the AF order suggests a crossover behavior of the Ce-4f electrons from localized to itinerant, similar to what is considered for the well known CeRhIn5 compound. In the presented work the low-temperature microscopic magnetic properties of the quasi-2D heavy fermion compound, CePt2In7 are investigated by using muSR. Clear evidence for the formation of a SDW order is presented. The magnetic order parameter fit well to a modified BSC gap-energy function in a strong-coupling scenario, possibly predicting the evolution of unconventional pairing in the pressure induced superconducting phase of this compound.
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Poster
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Multiple order parameter systems
Primary author
Dr
Martin Mansson
(Laboratory for Solid State Physics, ETH Zurich)
Co-authors
Prof.
Andrey Zheludev
(Laboratory for Solid State Physics, ETH Zurich)
Prof.
Daniel Andreica
(Babes-Bolyai University, Romania)
Dr
Eric D. Bauer
(Los Alamos National Laboratory, USA)
Dr
Jun Sugiyama
(Toyota Central Research and Development Labs. Inc., Japan)
Dr
Krunoslav Prsa
(Laboratory for Solid State Physics, ETH Zurich)
Prof.
Marco Grioni
(7Inst. of Condensed Matter Physics, EPF Lausanne, Switzerland)
Prof.
Oscar Tjernberg
(Materials Physics, Royal Insitute of Technology, KTH, Stockholm, Sweden)
Dr
Stephane Pons
(Inst. of Condensed Matter Physics, EPF Lausanne, Switzerland)
Dr
Thomasz Durakiewicz
(Los Alamos National Laboratory, USA)
Dr
Yasmine Sassa
(Laboratory for Solid State Physics, ETH Zurich)
