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Report No.

Phonon softening in Lu(Pt$$_{1-x}$$Pd$$_x$$)$$_2$$In close to a zero-temperature structural instability

Gruner, T.*; Lucas, S.*; Geibel, C.*; Kaneko, Koji   ; Tsutsui, Satoshi*; Schmalzl, K.*; Stockert, O.*

The disappearance of a charge-density-wave (CDW) transition in Lu(Pt$$_{1-x}$$Pd$$_x$$)$$_2$$In is thought to be closely linked to a maximum of the superconducting transition temperature in the system. We studied the superstructure and the phonon softening in Lu(Pt$$_{0.5}$$Pd$$_{0.5}$$)$$_2$$In by means of neutron and high-resolution inelastic X-ray scattering. A full phonon softening at $$q_{textrm{CDW}}$$ = (0.5, 0.5, 0) with the appearance of superstructure peaks could be clearly identified. The large tail of the superstructure intensity above the CDW transition indicates the importance of critical fluctuations.



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Category:Materials Science, Multidisciplinary



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