Enrique Zanardi

Low-symmetry polymorph of GaP upends bonding paradigms of metallic high-pressure III–V compounds

Barbara Lavina, Enrique Zanardi, A. Mújica, Hyunchae Cynn et autres

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Low-symmetry polymorph of GaP upends bonding paradigms of metallic high-pressure III-V compounds

Barbara Lavina, Enrique Zanardi, A. Mújica, Hyunchae Cynn et autres

The pressure-induced polymorphism of binary octect compounds has long been considered a settled problem although the possible atomic disordering of some phases remains a puzzling observation. Taking GaP as a case study, we conclude, through x-ray microdiffraction and first-principles calculations, that its …

Ab Initio Theoretical Study of DyScO3 at High Pressure

Enrique Zanardi, S. Radescu, A. Mújica, P. Rodríguez‐Hernández et autres

DyScO3 is a member of a family of compounds (the rare-earth scandates) with exceptional properties and prospective applications in key technological areas. In this paper, we study theoretically the behavior of DyScO3 perovskite under pressures up to about 65 GPa, including its …

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The structure of sc16 GaP obtained at 17.5 GPa and 1400 K

Barbara Lavina, Enrique Zanardi, A. Mújica, Hyunchae Cynn et autres

Using a laser-heated diamond anvil cell, a powdered sample of gallium phosphide was compressed to 17.5 GPa and heated up to 1400 K. The material obtained was characterized at room temperature using synchrotron x-ray diffraction. Experimental results were compared with first-principles calculations. …

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Stability of the sc16 polymorph of GaAs

Barbara Lavina, Enrique Zanardi, A. Mújica, Hyunchae Cynn et autres

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Dynamical resonance and tunneling in a driven system with periodic potential

Enrique Zanardi, J. M. Gomez Llorente

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Mixed dynamics and tunneling

Enrique Zanardi, Javier Gutiérrez, J. M. Gomez Llorente

A mechanism for the fluctuating features asociated with the general phenomenon known as chaos-assisted tunneling is presented. These features are shown to be the result of a gradual competition between classically allowed (mixing) and classically forbidden (tunneling) dynamical processes. A random-matrix description …

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