Issue |
EPL
Volume 94, Number 4, May 2011
|
|
---|---|---|
Article Number | 46004 | |
Number of page(s) | 5 | |
Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
DOI | https://doi.org/10.1209/0295-5075/94/46004 | |
Published online | 10 May 2011 |
Disorder-induced mobility edges and heat flow control in anharmonic acoustic chains
1
Theory of Oscillations Department, University of Nizhniy Novgorod - Nizhniy Novgorod, Russia
2
Max-Planck-Institut für Physik komplexer Systeme - Nöthnitzer Str. 38, 01187 Dresden, Germany, EU
Received:
24
December
2010
Accepted:
11
April
2011
We control the thermal conductivity of anharmonic acoustic chains by varying the strength of disorder in the interaction. It induces mobility edges in the phonon spectrum. Therefore we limit the amount of extended modes which can ballistically propagate. The rest of the modes becomes localized and opens a diffusive heat conductivity channel. The localized modes are sensitively controlling the contact resistances at the edges. Analytical arguments and numerical results yield several crossovers between dominating heat channels, when varying the system size and the temperature.
PACS: 63.20.Pw – Localized modes / 63.20.Ry – Anharmonic lattice modes / 05.45.-a – Nonlinear dynamics and chaos
© EPLA, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.