Anderson localization of phonons in thermally superinsulating graphene aerogels with metal-like electrical conductivity
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00587988" target="_blank" >RIV/68378271:_____/24:00587988 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0355083" target="_blank" >https://hdl.handle.net/11104/0355083</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/smtd.202301536" target="_blank" >10.1002/smtd.202301536</a>
Alternative languages
Result language
angličtina
Original language name
Anderson localization of phonons in thermally superinsulating graphene aerogels with metal-like electrical conductivity
Original language description
Here, we report the realization of Anderson localization of phonons in a random three-dimensional elastic network of graphene. We show that thermal conductivity in a cellular graphene aerogel can be drastically reduced to 0.9 mW m-1 K-1 by the application of compressive strain while keeping a high metal-like electrical conductivity of 120 S m-1 and ampacity of 0.9 A. Our experiments reveal that the strain can cause phonon localization over a broad compression range. The remaining heat flow in the material is dominated by charge transport. Conversely, the electrical conductivity exhibits a gradual increase with increasing compressive strain, opposite to the thermal conductivity. These results imply that strain engineering provides the ability to independently tune charge and heat transport, establishing a new paradigm for controlling phonon and charge conduction in solids.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/EH22_008%2F0004558" target="_blank" >EH22_008/0004558: Advanced MUltiscaLe materials for key Enabling Technologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Small Methods
ISSN
2366-9608
e-ISSN
2366-9608
Volume of the periodical
8
Issue of the periodical within the volume
9
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
2301536
UT code for WoS article
001197043600001
EID of the result in the Scopus database
2-s2.0-85189703118