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- Carnegie Institution for ScienceUS218 papers
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7 papers · 2 filters
The Effect of Pressure on the Negative Thermal Expansion of Solid Methane
Yu. A. Freiman, V. V. Vengerovsky, Alexander F. Goncharov
The effect of pressure on the thermal expansion of solid CH is calculated for the low temperature region where the contributions from phonons and librons can be neglected and o…
Experimental evidence of crystal symmetry protection for the topological nodal line semimetal state in ZrSiS
C. C. Gu, J. Hu, X. L. Chen +19
Tunable symmetry breaking plays a crucial role for the manipulation of topological phases of quantum matter. Here, through combined high-pressure magneto-transport measurements, Ra…
Intermolecular coupling and fluxional behavior of hydrogen in phase IV
Alexander F. Goncharov, Irina Chuvashova, Cheng Ji +1
We performed Raman and infrared (IR) spectroscopy measurements of hydrogen at 295 K up to 280 GPa at an IR synchrotron facility of SSRF. To reach the highest pressure, hydrogen was…
Phase Transition Pathway Sampling via Swarm Intelligence and Graph Theory
Li Zhu, R. E. Cohen, Timothy A. Strobel
The prediction of reaction pathways for solid-solid transformations remains a key challenge. Here, we develop a pathway sampling method via swarm intelligence and graph theory, and…
Giant electrocaloric effect at the antiferroelectric-to-ferroelectric phase boundary in PbZrTiO
A. V. Kimmel, O. T. Gindele, D. M. Duffy +1
Molecular dynamics simulations predict a giant electrocaloric effect at the ferroelectric-antiferroelectric phase boundary in PZT (PbTiO-PbZrO). These large-scale simulatio…
Exploiting symmetry-mismatch to control magnetism in a ferroelastic heterostructure
Er-Jia Guo, Ryan Desautels, Dongkyu Lee +11
In the bulk, LaCoO3 (LCO) is a paramagnet, yet in tensile strained thin films at low temperature ferromagnetism (FM) is observed, and its origin remains unresolved. Polarized neutr…