Fermi-Pasta-Ulam Physics with Nanomechanical Graphene Resonators: Intrinsic Relaxation and Thermalization from Flexural Mode Coupling
Artikel i vetenskaplig tidskrift, 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

Författare

Daniel Midtvedt

Chalmers, Teknisk fysik, Kondenserade materiens teori

Alexander Croy

Chalmers, Teknisk fysik, Kondenserade materiens teori

Andreas Isacsson

Chalmers, Teknisk fysik, Kondenserade materiens teori

Z. A. Qi

H. S. Park

Physical Review Letters

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

Vol. 112

Ämneskategorier

Fysik

DOI

10.1103/PhysRevLett.112.145503