Unconventional superconductivity and magnetism in $\rm CePt_3Si_{1-x}Ge_x$

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

doi:10.1016/j.physb.2005.01.062

arXiv · cond-mat/0408244

Unconventional superconductivity and magnetism in $\rm CePt_3Si_{1-x}Ge_x$

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

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Abstract

$\rm CePt_3Si$ is a novel ternary compound exhibiting antiferromagnetic order at $T_N \approx 2.2$ K and superconductivity (SC) at $T_c \approx 0.75$ K. Large values of $H_{c2}' \approx -8.5$ T/K and $H_{c2}(0) \approx 5$ T indicate Cooper pairs formed out of heavy quasiparticles. The mass enhancement originates from Kondo interaction with a characteristic temperature $T_K \approx 8$ K. NMR and $μ$SR measurements evidence coexistence of SC and long range magnetic order on a microscopic scale. Moreover, $\rm CePt_3Si$ is the first heavy fermion SC without an inversion symmetry. This gives rise to a novel type of the NMR relaxation rate $1/T_1$ 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.

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E. Bauer, G. Hilscher, H. Michor, M. Sieberer, E. W. Scheidt, A. Gribanov, Yu. Seropegin, P. Rogl, A. Amato, W. Y. Song, J. -G. Park, D. T. Adroja, M. Nicklas, G. Sparn, M. Yogi, Y. Kitaoka. 2004-08-11. Unconventional superconductivity and magnetism in $\rm CePt_3Si_{1-x}Ge_x$. https://doi.org/10.1016/j.physb.2005.01.062

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