5 papers
Tracing the horizon of tetragonal-to-monoclinic distortion in pressurized trilayer nickelate La4Ni3O10
Sitaram Ramakrishnan, Yingzheng Gao, Valerio Olevano +18
The study investigates pressure‑ and temperature‑induced structural transitions in the trilayer nickelate La4Ni3O10, revealing a direct tetragonal‑to‑monoclinic transition, associa…
Pressure-Driven Structural Transitions without a Displacive Charge-Density Wave in LaSmNiO
J. Huang, Sitaram Ramakrishnan, P. Rodière +7
We investigated the structural properties of bilayer nickelate LaSmNiO as a function of pressure and temperature. At ambient conditions, we show that the material cryst…
Evidence of electronic instability driven structural distortion in the nodal line semimetal CoSn
Suman Nandi, Bishal Maity, Shovan Dan +8
Understanding the mechanisms that drive spontaneous rotational symmetry breaking in correlated electron systems is a central challenge in condensed matter physics. Although such sy…
An underdog story: Re-emergence of a polar instability at high pressure in KNbO3
Mohamad Baker Shoker, Sitaram Ramakrishnan, Boris Croes +12
Ferroelectricity in perovskites is known to be suppressed by a moderate hydrostatic pressure. The notion that a polar instability should reappear in a higher pressure regime is wel…
Multilayer Crystal Field states from locally broken centrosymmetry
Owen Moulding, Makoto Shimizu, Amit Pawbake +9
Local charge, spin, or orbital degrees of freedom with intersite interactions are oftentimes sufficient to construct most quantum orders. This is conventionally true for f-electron…