Výsledky vyhledávání - "F. X. Alvarez"

Thermal solitons along wires with flux-limited lateral exchange

Autor: J. Bafaluy, F. X. Alvarez, Michele Sciacca, David Jou

We obtain some exact solutions in the context of solitons, for heat conduction with inertia along a cylinder whose heat exchange with the environment is a non-linear function of the difference of temperatures of the cylinder and the environment, due

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6e9d0a875cbed92894a174c82c3df53
http://hdl.handle.net/10447/550909

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Observation of second sound in a rapidly varying temperature field in Ge

Autor: Claudio Melis, Lluc Sendra, F. X. Alvarez, Juan Sebastián Reparaz, Juan Camacho, Maria Isabel Alonso, Javier Bafaluy, Riccardo Rurali, Luis Alberto Pérez, Albert Beardo, Luciano Colombo, Miquel López-Suárez

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
instname
Digital.CSIC: Repositorio Institucional del CSIC
Consejo Superior de Investigaciones Científicas (CSIC)
Science Advances

Second sound is known as the thermal transport regime where heat is carried by temperature waves. Its experimental observation was previously restricted to a small number of materials, usually in rather narrow temperature windows. We show that it is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f26f864b872ef002245d84fc88a2da9e
https://doi.org/10.1126/sciadv.abg4677

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Beating the thermal conductivity alloy limit using long-period compositionally graded Si1–xGex superlattices

Autor: José Santiso, Davide Donadio, M. I. Alonso, F. X. Alvarez, Miquel Garriga, Gemma Garcia, Pablo Ferrando-Villalba, Javier Rodríguez-Viejo, Alejandro R. Goñi, Shunda Chen, Aitor F. Lopeandía

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
instname

Superlattices with scattering mechanisms at multiple length scales efficiently scatter phonons at all relevant wavelengths and provide a convenient route to reduce thermal transport. Here, we show, both experimentally and by atomistic simulations, th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb655d53c3d2c08a3d9ca565a1be43d9
http://hdl.handle.net/10261/233383

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Phonon hydrodynamics in frequency-domain thermoreflectance experiments

Autor: Albert Beardo, Timothy G. Myers, Juan Camacho, Javier Bafaluy, Lluc Sendra, F. X. Alvarez, Matthew G. Hennessy

Publikováno v: RECERCAT (Dipòsit de la Recerca de Catalunya)
Recercat. Dipósit de la Recerca de Catalunya
instname
Recercat: Dipósit de la Recerca de Catalunya
Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)

The hydrodynamic heat transport equation with appropriate boundary conditions and ab initio calculated coefficients is validated by comparing the corresponding analytical and numerical solutions with frequency-domain thermoreflectance experimental me

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f670561ccdf16d9c3d79af16febb33d6
https://doi.org/10.1103/physrevb.101.075303

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Nonlocal Transport Equations for Small Systems and Fast Processes

Autor: F. X. Alvarez, David Jou, Antonio Sellitto

Publikováno v: Encyclopedia of Continuum Mechanics ISBN: 9783662536056

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15ac1b09abc161493b69e614c7ba8459
https://doi.org/10.1007/978-3-662-55771-6_64

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Thermal conductivity and phonon hydrodynamics in transition metal dichalcogenides from first-principles

Autor: Riccardo Rurali, F. X. Alvarez, Xavier Cartoixà, Pol Torres

Publikováno v: 2D Materials
Digital.CSIC. Repositorio Institucional del CSIC
instname

We carry out a systematic study of the thermal conductivity of four single-layer transition metal dichalcogenides, MX$_2$ (M = Mo, W; X = S, Se) from first-principles by solving the Boltzmann Transport Equation (BTE). We compare three different theor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec63891971e1f6d969a361d40353e39e
http://arxiv.org/abs/1903.11920

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Hydrodynamic Heat Transport in Compact and Holey Silicon Thin Films

Autor: Albert Beardo, Javier Bafaluy, Juan Camacho, Marc Calvo-Schwarzwälder, Pol Torres, Lluc Sendra, F. X. Alvarez, Timothy G. Myers

Publikováno v: Physical Review Applied. 11

The breakdown of Fourier's law in nanoscale thermal transport, which has become (ahem) a $h\phantom{\rule{0}{0ex}}o\phantom{\rule{0}{0ex}}t$ topic lately due to improvements in experimental precision, presents a serious problem for analysis of heat f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7976eceb67259f9e19a2144cc86f021f
https://doi.org/10.1103/physrevapplied.11.034003

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Heat solitons and thermal transfer of information along thin wires

Autor: J. Bafaluy, Michele Sciacca, David Jou, F. X. Alvarez

Publikováno v: International Journal of Heat and Mass Transfer. 155:119809

The aim of this paper is to consider soliton propagation of heat signals along a cylinder whose heat exchange with the environment is a non-linear function of the difference of temperatures of the cylinder and the environment and whose heat transfer

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c607345ac5bfc3f2573d547e37dc295
https://doi.org/10.1016/j.ijheatmasstransfer.2020.119809

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Effective thermal conductivity of rectangular nanowires based on phonon hydrodynamics

Autor: Marc Calvo-Schwarzwälder, Timothy G. Myers, Matthew G. Hennessy, F. X. Alvarez, Pol Torres

Publikováno v: International Journal of Heat and Mass Transfer
RECERCAT (Dipòsit de la Recerca de Catalunya)
Recercat: Dipósit de la Recerca de Catalunya
Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Recercat. Dipósit de la Recerca de Catalunya
instname

A mathematical model is presented for thermal transport in nanowires with rectangular cross sections. Expressions for the effective thermal conductivity of the nanowire across a range of temperatures and cross-sectional aspect ratios are obtained by

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb637887bcd75f21d8f80a3b2037a07d
https://doi.org/10.1016/j.ijheatmasstransfer.2018.05.096

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Emergence of hydrodynamic heat transport in semiconductors at the nanoscale

Autor: Alvar Torelló, Amirkoushyar Ziabari, Juan Camacho, Xavier Cartoixà, A. Shakouri, Pol Torres, F. X. Alvarez, Javier Bafaluy

Publikováno v: Physical Review Materials. 2

Several recent experiments have demonstrated the failure of the Fourier heat equation in semiconductors at the nanoscale. We show that a generalized heat transport equation including a hydrodynamic term can explain three of these experiments on a sil

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c6e63f8db1514f157e49df97d9ba53d7
https://doi.org/10.1103/physrevmaterials.2.076001

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