Soft phonon mode in BaNi2(As1-xPx)2
BaNi2As2, a candidate system for charge-driven electronic nematicity, features an incommensurate charge-density-wave (CDW) order which can be suppressed by 10% of P-doping in BaNi2(As1-xPx)2. Recently, inelastic x-ray scattering (IXS) identified the corresponding CDW soft phonon mode in BaNi2As2. Contrary to expectations, it seems that the soft mode already acquires zero energy up to 30K above TCDW = 146K, though the temperature where the soft mode indeed reaches zero energy could not be identified unambiguously. Here, we propose to measure the T-dependence of the CDW soft mode in BaNi2(As1-xPx)2 with x = 0 and x = 0.07 (TCDW = 85K). Most importantly, the Gaussian-like INS energy resolution will enable a clear distinction of the Lorentzian-like (nearly) overdamped soft mode from the elastic line ¿ impossible in IXS due to the Lorentzian-like resolution function. Results for x=0 will clarify the soft mode behavior and measurements for x = 0.07 will shed light on the soft mode when TCDW is suppressed by a factor of two and better separated from a triclinic phase transition following at lower temperatures.
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The recommended format for citing this dataset in a research publication is in the following format:
WEBER Frank; HAGHIGHIRAD Amir-Abbas; LACMANN Tom Laurin; LE TACON Matthieu; SOULIOU Sofia Michaela and STEFFENS Paul. (2023). Soft phonon mode in BaNi2(As1-xPx)2. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-02-224
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This data is not yet public
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