TY - JOUR
T1 - Tuning Coherent-Phonon Heat Transport in LaCoO3/SrTiO3Superlattices
AU - Bugallo, D.
AU - Langenberg, E.
AU - Carbó-Argibay, E.
AU - Varela Dominguez, Noa
AU - Fumega, A. O.
AU - Pardo, V.
AU - Lucas, Irene
AU - Morellón, Luis
AU - Rivadulla, F.
N1 - | openaire: EC/H2020/734187/EU//SPICOLOST
Funding Information:
This work has received financial support from Ministerio de Economía y Competitividad (Spain) under project Nos. MAT2016-80762-R and PID2019-104150RB-I00, Xunta de Galicia (Centro singular de investigación de Galicia accreditation 2019-2022, ED431G 2019/03), the European Union (European Regional Development Fund-ERDF), and the European Commission through the Horizon H2020 funding by H2020-MSCA-RISE-2016- Project No. 734187-SPICOLOST. E.L. is a Serra Húnter Fellow (Generalitat de Catalunya). D.B. acknowledges financial support from MINECO (Spain) through an FPI fellowship (BES-2017-079688). V.P. and A.O.F. were supported by the MINECO of Spain through the project PGC2018-101334-B-C21. A.O.F. thanks MECD for the financial support received through the FPU grant FPU16/02572. This work was carried out in part through the use of the INL User Facilities.
Publisher Copyright:
© 2021 The Authors. Published by American Chemical Society.
PY - 2021/12/16
Y1 - 2021/12/16
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85121050297&partnerID=8YFLogxK
U2 - 10.1021/acs.jpclett.1c03418
DO - 10.1021/acs.jpclett.1c03418
M3 - Article
AN - SCOPUS:85121050297
SN - 1948-7185
VL - 12
SP - 11878
EP - 11885
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 49
M1 - 49
ER -