Classical to quantum transition of heat transfer between two silica clusters.
Heat transfer between two silica clusters is investigated by using the nonequilibrium Green's function method. In the gap range between 4 Å and 3 times the cluster size, the thermal conductance decreases as predicted by the surface charge-charge interaction. Above 5 times the cluster size, the volume dipole-dipole interaction predominates. Finally, when the distance becomes smaller than 4 Å, a quantum interaction where the electrons of both clusters are shared takes place. This quantum interaction leads to the dramatic increase of the thermal coupling between neighbor clusters due to strong interactions. This study finally provides a description of the transition between radiation and heat conduction in gaps smaller than a few nanometers.
CNRS, UPR 288 Laboratoire d'Energétique Moléculaire et Macroscopique, Combustion (EM2C), Grande Voie des Vignes, 92295 Châtenay-Malabry, France and Ecole Centrale Paris, Grande Voie des Vignes, 92295 Châtenay-Malabry, France.
Shiyun
S
Xiong
Nano-Bio Spectroscopy Group and ETSF Scientific Development Centre Departamento Fisica de Materiales, Universidad del Pais Vasco UPV/EHU, E-20018 San Sebastian, Spain.
Kaike
K
Yang
CNRS, UPR 288 Laboratoire d'Energétique Moléculaire et Macroscopique, Combustion (EM2C), Grande Voie des Vignes, 92295 Châtenay-Malabry, France and Ecole Centrale Paris, Grande Voie des Vignes, 92295 Châtenay-Malabry, France and Semenov Institute of Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia.
Yuriy A
YA
Kosevich
CNRS, UPR 288 Laboratoire d'Energétique Moléculaire et Macroscopique, Combustion (EM2C), Grande Voie des Vignes, 92295 Châtenay-Malabry, France and Ecole Centrale Paris, Grande Voie des Vignes, 92295 Châtenay-Malabry, France.
Yann
Y
Chalopin
Nano-Bio Spectroscopy Group and ETSF Scientific Development Centre Departamento Fisica de Materiales, Universidad del Pais Vasco UPV/EHU, E-20018 San Sebastian, Spain and IKERBASQUE, Basque Foundation for Science, E-48011 Bilbao, Spain.
Roberto
R
D'Agosta
Laboratoire Structures, Propriétés et Modélisation des Solides, UMR CNRS 8580, École Centrale Paris, 92295 Châtenay-Malabry, France.
Pietro
P
Cortona
CNRS, UPR 288 Laboratoire d'Energétique Moléculaire et Macroscopique, Combustion (EM2C), Grande Voie des Vignes, 92295 Châtenay-Malabry, France and Ecole Centrale Paris, Grande Voie des Vignes, 92295 Châtenay-Malabry, France.
Sebastian
S
Volz
D004735:Energy Transfer; D006358:Hot Temperature; D008962:Models, Theoretical; D011789:Quantum Theory; D012822:Silicon Dioxide / Q000737:chemistry*; D013816:Thermodynamics
D012822:Silicon Dioxide