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Giant electrophononic response in PbTiO by strain engineering
Pol Torres, Jorge Íñiguez, Riccardo Rurali
We demonstrate theoretically how, by imposing epitaxial strain in a ferroelectric perovskite, it is possible to achieve a dynamical control of phonon propagation by means of extern…
New insights in the lattice dynamics of monolayers, bilayers, and trilayers of WSe2 and unambiguous determination of few-layer-flakes' thickness
Marta De Luca, Xavier Cartoixà, Javier Martín-Sánchez +4
Among the most common few-layers transition metal dichalcogenides (TMDs), WSe2 is the most challenging material from the lattice dynamics point of view. Indeed, for a long time the…
Anisotropy-driven thermal conductivity switching and thermal hysteresis in a ferroelectric
Juan Antonio Seijas-Bellido, Jorge Íñiguez, Riccardo Rurali
We present a theoretical proposal for the design of a thermal switch based on the anisotropy of the thermal conductivity of PbTiO3 and of the possibility to rotate the ferroelectri…
Thermal conductivity and phonon hydrodynamics in transition metal dichalcogenides from first-principles
Pol Torres, Francesc Xavier Alvarez, Xavier Cartoixà +1
We carry out a systematic study of the thermal conductivity of four single-layer transition metal dichalcogenides, MX (M = Mo, W; X = S, Se) from first-principles by solving th…
Thermal conductivity for III-V and II-VI semiconductor wurtzite and zinc-blende polytypes: the role of anharmonicity and phase space
Martí Raya-Moreno, Riccardo Rurali, Xavier Cartoixà
We calculate the lattice thermal conductivity () for cubic (zinc-blende) and hexagonal (wurtzite) phases for 8 semiconductors using calculations and solving…