Uniaxial pressure effects on CeIrIn5 and CeCoIn5 studied by low-temperature thermal expansion.

@article{Oeschler2003UniaxialPE,
  title={Uniaxial pressure effects on CeIrIn5 and CeCoIn5 studied by low-temperature thermal expansion.},
  author={Niels Oeschler and Philipp Gegenwart and Michael Lang and Roman Movshovich and John L. Sarrao and Julie Thompson and Frank Steglich},
  journal={Physical review letters},
  year={2003},
  volume={91 7},
  pages={
          076402
        }
}
We report low-temperature thermal expansion measurements on the tetragonal heavy-fermion superconductors CeMIn5 (M=Ir,Co) in magnetic fields up to 8 T which allow for the analysis of the uniaxial pressure effects on both normal-state and superconducting properties. Our study reveals that T(c) is strongly affected by at least two factors, the lattice anisotropy and the 4f-conduction-electron hybridization strength which is most sensitive to c-axis lattice distortions. Non-Fermi-liquid behavior… CONTINUE READING

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