Fermi-Pasta-Ulam Physics with Nanomechanical Graphene Resonators: Intrinsic Relaxation and Thermalization from Flexural Mode Coupling
Journal article, 2014

Thermalization in nonlinear systems is a central concept in statistical mechanics and has been extensively studied theoretically since the seminal work of Fermi, Pasta, and Ulam. Using molecular dynamics and continuum modeling of a ring-down setup, we show that thermalization due to nonlinear mode coupling intrinsically limits the quality factor of nanomechanical graphene drums and turns them into potential test beds for Fermi-Pasta-Ulam physics. We find the thermalization rate Gamma to be independent of radius and scaling as Gamma similar to T* /is an element of(2)(pre), where T* and is an element of(pre) are effective resonator temperature and prestrain.

MONOLAYER GRAPHENE

Physics

DYNAMICS

ELASTIC PROPERTIES

Multidisciplinary

LIMIT

SYSTEMS

DISSIPATION

Author

Daniel Midtvedt

Chalmers, Applied Physics, Condensed Matter Theory

Alexander Croy

Chalmers, Applied Physics, Condensed Matter Theory

Andreas Isacsson

Chalmers, Applied Physics, Condensed Matter Theory

Z. A. Qi

H. S. Park

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 112 14

Subject Categories

Physical Sciences

DOI

10.1103/PhysRevLett.112.145503

More information

Created

10/7/2017