Raffaello Bianco Raffaello Bianco – Materials Physics Center, San Sebastian, Spain

Postdoctoral researcher at the Materials Physics Center .

e-mail: raffaello.bianco@ehu.eus

Matteo Calandra Matteo Calandra – University of Trento, Trento, Italy

Full Professor at the University of Trento and CNRS Research Director at Sorbonne Université .

e-mail: m.calandrabuonaura@unitn.it

Marco Cherubini Marco Cherubini – Università di Roma La Sapienza, Rome, Italy

PhD student at the Università di Roma La Sapienza .

e-mail: marco.cherubini@uniroma1.it

Ion Errea Ion Errea – University of the Basque Country, San Sebastian, Spain

Professor at the University of the Basque Country (UPV/EHU), leader of the Quantum Theory of Materials group at the Materials Physics Center, and associated researcher at the Donostia International Physics Center .

e-mail: ion.errea@ehu.eus

Francesco Mauri Francesco Mauri – Università di Roma La Sapienza, Rome, Italy

Full Professor at the Università di Roma La Sapienza .

e-mail: francesco.mauri@uniroma1.it

Lorenzo Monacelli Lorenzo Monacelli – Università di Roma La Sapienza, Rome, Italy

Postdoctoral researcher at Università di Roma La Sapienza .

e-mail: lorenzo.monacelli@roma1.infn.it