Now showing items 1-10 of 10

    • Analysis of the temperature dependence of the thermal conductivity of insulating single crystal oxides 

      Langenberg Pérez, Eric; Ferreiro Vila, Elías; Leborán Alvarez, Víctor; Fumega, Adolfo; Pardo, Victor; Rivadulla Fernández, José Francisco (AIP Publishing LLC, 2016-10)
      The temperature dependence of the thermal conductivity of 27 different single crystal oxides is reported from ≈20 K to 350 K. These crystals have been selected among the most common substrates for growing epitaxial thin-film ...
    • Electronic Degeneracy and Intrinsic Magnetic Properties of Epitaxial Nb :  SrTiO3 Thin Films Controlled by Defects 

      Sarantopoulos, Alexandros; Ferreiro Vila, Elías; Pardo, Victor; Magén, Cesar; Aguirre, Myriam Haydee; Rivadulla Fernández, José Francisco (APS Physics, 2015)
      We report thermoelectric power experiments in e-doped thin films of SrTiO3 (STO) which demonstrate that the electronic band degeneracy can be lifted through defect management during growth. We show that even small amounts ...
    • Epitaxial stabilization of pulsed laser deposited Srn+1IrnO3n+1 thin films: Entangled effect of growth dynamics and strain 

      Gutiérrez Llorente, Araceli; Iglesias Bernardo, Lucía; Rodríguez González, Benito; Rivadulla Fernández, José Francisco (AIP Publishing, 2018)
      The subtle balance of electronic correlations, crystal field splitting, and spin–orbit coupling in layered Ir4+ oxides can give rise to novel electronic and magnetic phases. Experimental progress in this field relies on ...
    • ¿Es generalizable la existencia de una transición de primer orden ferromagnética-paramagnética en los materiales con magnetorresistencia colosal R2/3B1/3MnO3 (R=lantanido; B=alcalinoterreo)? 

      Mira Pérez, Jorge; Rivas Rey, José; Rivadulla Fernández, José Francisco; López Quintela, Manuel Arturo (Real Academia Galega de Ciencias, 1998)
      En este trabajo se examina la naturaleza de la transición de fase ferromagnética de materiales de manganeso con estructura de perovskita, de gran interés tecnológico por sus enormes variaciones de resistividad eléctrica ...
    • Ferroelectric Domain Walls in PbTiO3 Are Effective Regulators of Heat Flow at Room Temperature 

      Langenberg Pérez, Eric; Saha, Dipanjan; Holtz, Megan E.; Wang, Jian-Jun; Bugallo Ferrón, David; Ferreiro Vila, Elías; Paik, Hanjong; Hanke, Isabelle; Ganschow, Steffen; Muller, David A.; Chen, Long-Qing; Catalan, Gustau; Domingo, Neus; Malen, Jonathan; Schlom, Darrell G.; Rivadulla Fernández, José Francisco (American Chemical Society, 2019)
      Achieving efficient spatial modulation of phonon transmission is an essential step on the path to phononic circuits using “phonon currents”. With their intrinsic and reconfigurable interfaces, domain walls (DWs), ferroelectrics ...
    • High quality thin films of thermoelectric misfit cobalt oxides prepared by a chemical solution method 

      Rivas Murias, Beatriz; Vila Fungueiriño, José Manuel; Rivadulla Fernández, José Francisco (Nature Publishing Group, 2015)
      Misfit cobaltates ([Bi/Ba/Sr/Ca/CoO]nRS[CoO2]q) constitute the most promising family of thermoelectric oxides for high temperature energy harvesting. However, their complex structure and chemical composition makes extremely ...
    • Quantification of the interfacial and bulk contributions to the longitudinal spin Seebeck effect 

      Jiménez Cavero, Pilar; Lucas, Irene; Bugallo Ferrón, David; López Bueno, Carlos; Ramos Amigo, Rafael Enrique; Algarabel, Pedro Antonio; Ibarra, Manuel Ricardo; Rivadulla Fernández, José Francisco; Morellón, Luis (AIP Publishing, 2021)
      We report the disentanglement of bulk and interfacial contributions to the thermally excited magnon spin current in the spin Seebeck effect under static heating. For this purpose, we have studied the dependence of the ...
    • Strain-induced enhancement of the thermoelectric power in thin films of hole-doped La2NiO4+δ 

      Bach, P. L.; Vila-Fungueiriño, José M.; Leborán Alvarez, Víctor; Ferreiro Vila, Elías; Rodríguez-González, Benito; Rivadulla Fernández, José Francisco (AIP Publishing, 2013)
      We propose a novel route for optimizing the thermoelectric power of a polaronic conductor, independent of its electronic conductivity. This mechanism is exemplified here in thin-films of La2NiO4+δ. Tensile stress induced ...
    • Sub-µL measurements of the thermal conductivity and heat capacity of liquids 

      López Bueno, Carlos; Bugallo Ferrón, David; Leborán Alvarez, Víctor; Rivadulla Fernández, José Francisco (Royal Society of Chemistry, 2018)
      We present the analysis of the thermal conductivity, κ, and heat capacity, Cp, of a wide variety of liquids, covering organic molecular solvents, ionic liquids and water–polymer mixtures. These data were obtained from ≈0.6 ...
    • Tuning coherent-phonon heat transport in LaCoO3/SrTiO3 Superlattices 

      Rivadulla Fernández, José Francisco; Bugallo Ferrón, David; Langenberg Pérez, Eric; Carbo-Argibay, Enrique; Varela Domínguez, Noa; Otero Fumega, Adolfo; Pardo Castro, Víctor; Lucas del Pozo, Irene; Morellón Alquézar, Luis Alberto (ACS Publications, 2021)
      Accessing the regime of coherent phonon propagation in nanostructures opens enormous possibilities to control the thermal conductivity in energy harvesting devices, phononic circuits, etc. In this paper we show that coherent ...





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