Evolution of critical order parameter fluctuations close to a structural quantumcritical point in Lu(Pt,Pd)2In
The intermetallic alloying series Lu(Pt,Pd)2In is one of the rare examples showing a structural quantum critical point (QCP), i.e. a continuous phase transition occurring at T=0. In contrast to usual magnetic QCPs, critical fluctuations of the crystal structure instead of magnetic fluctuations play an important role for the evolution of exotic phases like superconductivity. In the case of pure LuPt2In a Peierls transition occurs at Ts=490K, which is continuously suppressed to Ts=0 by substituting Pd for Pt. At a Pd content of about 55%, a QCP is approached and remarkably, superconductivity is clearly enhanced, indicating a strong influence of the low-energy quantum fluctuations on the electron-phonon coupling. Having already investigated 2 samples of the alloying series being located close to the QCP we could nicely track the phonon softening and observe enhanced phonon intensities close to the structural phase transition. However, to distinguish the effect of critical quantum fluctuations from the softening and to find out from which initial energy scale the softening sets in, we propose to measure a third sample being located in the overcritical regime to complete the dataset.
The data is currently only available to download if you are a member of the proposal team.
The recommended format for citing this dataset in a research publication is in the following format:
LUCAS Stefan; GEIBEL Christoph; GRUNER Thomas; KWON Jaehyeon; SCHMALZL Karin; SCHMIDT Wolfgang F and STOCKERT Oliver. (2018). Evolution of critical order parameter fluctuations close to a structural quantumcritical point in Lu(Pt,Pd)2In. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.CRG-2434
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This data is not yet public
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