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Unconventional superconductivity and magnetism in CePt3Si1-xGex

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons126782

Nicklas,  M.
Michael Nicklas, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons126858

Sparn,  G.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Bauer, E., Hilscher, G., Michor, H., Sieberer, M., Scheidt, E. W., Gribanov, A., et al. (2005). Unconventional superconductivity and magnetism in CePt3Si1-xGex. Physica B-Condensed Matter, 359-361, 360-367. doi:10.1016/j.physb.2005.01.062.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0015-2D01-3
Abstract
CePt3SiCePt3Si is a novel ternary compound exhibiting antiferromagnetic order at View the MathML sourceTN≈2.2K and superconductivity (SC) at View the MathML sourceTc≈0.75K. Large values of View the MathML sourceHc2′≈-8.5T/K and View the MathML sourceHc2(0)≈5T indicate Cooper pairs formed out of heavy quasiparticles. The mass enhancement originates from Kondo interaction with a characteristic temperature View the MathML sourceTK≈8K. NMR and μSRμSR measurements evidence coexistence of SC and long-range magnetic order on a microscopic scale. Moreover, CePt3SiCePt3Si is the first heavy fermion SC without an inversion symmetry. This gives rise to a novel type of NMR relaxation rate 1/T11/T1 which is very unique and never reported before for other heavy fermion superconductors. Studies of Si/Ge substitution allow us to establish a phase diagram.