Unconventional superconductivity and magnetism in CePt3Si1-xGex

Bauer, E.; Hilscher, G.; Michor, H.; Sieberer, M.; Scheidt, E. W.; Gribanov, A.; Seropegin, Y.; Rogl, P.; Amato, A.; Song, W. Y.; Park, J.-G.; Adroja, D. T.; Nicklas, M.; Sparn, G.; Yogi, M.; Kitaoka, Y.

doi:10.1016/j.physb.2005.01.062

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Unconventional superconductivity and magnetism in CePt₃Si_1-xGe_x

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

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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 CePt₃Si_1-xGe_x. Physica B-Condensed Matter, 359-361, 360-367. doi:10.1016/j.physb.2005.01.062.

Cite as: https://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.