Rivadulla Fernández, José FranciscoGiménez López, María del CarmenVarela Domínguez, Noa2025-12-102025-12-102025https://hdl.handle.net/10347/44338This PhD thesis explores the development of thermal switches: materials whose thermal conductivity can be precisely and reversibly controlled on demand by the application of an external stimulus. Four strategies have been investigated, based on a different physical mechanism and material platform: photoisomerization in azobenzene-based mesophases, topotactic redox transformations in (Ca,Sr)FeO3 thin films, electric-field driven oxygen vacancy engineering in charge-transfer oxides, and polar topology manipulation in PbTiO3/SrTiO3 superlattices. The results establish heat transport as a functional, tunable property, opening pathways for programmable thermal materials in advanced technologies.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/thermal transportthermal switchessolid-state chemistrythin filmsmesophases221033 Fenómenos de transportedoctoral thesisopen access