Tuning coherent-phonon heat transport in LaCoO3/SrTiO3 superlattices

Bugallo D. ; Langenberg E. ; Carbó-Argibay E. ; Varela Dominguez N. ; Fumega A.O. ; Pardo V. ; Lucas, I. (Universidad de Zaragoza) ; Morellón, L. (Universidad de Zaragoza) ; Rivadulla F.

Resumen: 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 phonons contribute substantially to the thermal conductivity of LaCoO3/SrTiO3 oxide superlattices, up to room temperature. We show that their contribution can be tuned through small variations of the superlattice periodicity, without changing the total superlattice thickness. Using this strategy, we tuned the thermal conductivity by 20% at room temperature. We also discuss the role of interface mixing and epitaxial relaxation as an extrinsic, material dependent key parameter for understanding the thermal conductivity of oxide superlattices. © 2021 The Authors. Published by American Chemical Society.

Idioma: Inglés

DOI: 10.1021/acs.jpclett.1c03418

Año: 2021

Publicado en: Journal of Physical Chemistry Letters 12, 49 (2021), 11878-11885
ISSN: 1948-7185

Factor impacto JCR: 6.888 (2021)

Categ. JCR: PHYSICS, ATOMIC, MOLECULAR & CHEMICAL rank: 5 / 36 = 0.139 (2021) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 88 / 345 = 0.255 (2021) - Q2 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 41 / 109 = 0.376 (2021) - Q2 - T2
Categ. JCR: CHEMISTRY, PHYSICAL rank: 46 / 165 = 0.279 (2021) - Q2 - T1

Factor impacto CITESCORE: 9.8 - Materials Science (Q1)

Factor impacto SCIMAGO: 2.009 - Nanoscience and Nanotechnology (Q1) - Materials Science (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/EC/H2020/734187/EU/Spin conversion, logic storage in oxide-based electronics/SPICOLOST
Financiación: info:eu-repo/grantAgreement/ES/MICINN-FEDER/PID2019-104150RB-I00
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2016-80762-R

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)