Please use this identifier to cite or link to this item:
|Title:||Anomalous heat diffusion|
|Citation:||Liu, S., Hänggi, P., Li, N., Ren, J., Li, B. (2014-01-28). Anomalous heat diffusion. Physical Review Letters 112 (4) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevLett.112.040601|
|Abstract:||Consider anomalous energy spread in solid phases, i.e., Δx2(t)≡∫(x-x)2ρE(x,t)dx tβ, as induced by a small initial excess energy perturbation distribution ρE(x,t=0) away from equilibrium. The second derivative of this variance of the nonequilibrium excess energy distribution is shown to rigorously obey the intriguing relation d2Δx2(t)/dt2=2CJJ(t)/(kBT2c), where CJJ(t) equals the thermal equilibrium total heat flux autocorrelation function and c is the specific volumetric heat capacity. Its integral assumes a time-local Helfand-like relation. Given that the averaged nonequilibrium heat flux is governed by an anomalous heat conductivity, the energy diffusion scaling determines a corresponding anomalous thermal conductivity scaling behavior. © 2014 American Physical Society.|
|Source Title:||Physical Review Letters|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Sep 19, 2018
WEB OF SCIENCETM
checked on Sep 4, 2018
checked on May 4, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.