Pressure-Driven Structural Transitions without a Displacive Charge-Density Wave in La${}_2$SmNi${}_2$O${}_7$

J. Huang, Sitaram Ramakrishnan, P. Rodière +7

We investigated the structural properties of bilayer nickelate La${}_2$SmNi${}_2$O${}_7$ as a function of pressure and temperature. At ambient conditions, we show that the material cryst…