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Quantum paraelectricity and structural phase transitions in strontium titanate beyond density-functional theory
Carla Verdi, Luigi Ranalli, Cesare Franchini +1
We demonstrate an approach for calculating temperature-dependent quantum and anharmonic effects with beyond density-functional theory accuracy. By combining machine-learned potenti…
Temperature-dependent anharmonic phonons in quantum paraelectric KTaO by first principles and machine-learned force fields
Luigi Ranalli, Carla Verdi, Lorenzo Monacelli +3
Understanding collective phenomena in quantum materials from first principles is a promising route toward engineering materials properties on demand and designing new functionaliti…
Combining Machine Learning and Many-Body Calculations: Coverage-Dependent Adsorption of CO on Rh(111)
Peitao Liu, Jiantao Wang, Noah Avargues +5
Adsorption of carbon monoxide (CO) on transition-metal surfaces is a prototypical process in surface sciences and catalysis. Despite its simplicity, it has posed great challenges t…
Zero-point Renormalization of the Band Gap of Semiconductors and Insulators Using the PAW Method
Manuel Engel, Henrique Miranda, Laurent Chaput +4
We evaluate the zero-point renormalization (ZPR) due to electron-phonon interactions of 28 solids using the projector-augmented-wave (PAW) method. The calculations cover diamond, m…
Many-body Green's function approaches to the doped Fröhlich solid: Exact solutions and anomalous mass enhancement
Nikolaus Kandolf, Carla Verdi, Feliciano Giustino
In polar semiconductors and insulators, the Fröhlich interaction between electrons and long-wavelength longitudinal optical phonons induces a many-body renormalization of the carri…