2024-03-29T09:56:57Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/2032162021-10-29T07:20:26Zcom_10261_46com_10261_3col_10261_299
Theoretical investigation of lattice thermal conductivity and electrophononic effects in SrTiO3
Torres, Pol
Seijas Bellido, Juan Antonio
Escorihuela Sayalero, Carlos
Íñiguez, Jorge
Rurali, Riccardo
We present a theoretical study of the lattice thermal conductivity of
SrTiO
3
in its antiferrodistortive ferroelastic phase and of its dependence on an applied external electric field, via electrophononic couplings. The calculations are done by using second-principles density-functional theory and the full solution of the Boltzmann transport equation. Our results allow, on one hand, to identify and explain deviations from the usual temperature dependence of the thermal conductivity, revealing Poiseuille flow and a rare umklapp transport regime, in agreement with recent experimental results [Martelli et al., Phys. Rev. Lett. 120, 125901 (2018)]; on the other hand, they show that an external electric field, by reducing the symmetry of the lattice, activates different phonon-phonon scattering processes and thus yields a reduction of the thermal conductivity, supporting the generality of a heat control strategy previously reported by some of us [Seijas-Bellido et al., Phys. Rev. B 97, 184306 (2018)]
2020-03-09T11:57:28Z
2020-03-09T11:57:28Z
2019-04
artículo
http://hdl.handle.net/10261/203216
Publisher's version
http://dx.doi.org/10.1103/PhysRevMaterials.3.044404
Sí
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2013-40581-P
MICIU/ICTI2017-2020/MAT2017-90024-P
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2015-0496
openAccess