Cooling of Nanomechanical Resonators by Thermally Activated Single-Electron Transport
Artikel i vetenskaplig tidskrift, 2011

We show that the vibrations of a nanomechanical resonator can be cooled to near its quantum ground state by tunneling injection of electrons from a scanning tunneling microscope tip. The interplay between two mechanisms for coupling the electronic and mechanical degrees of freedom results in a bias-voltage-dependent difference between the probability amplitudes for vibron emission and absorption during tunneling. For a bias voltage just below the Coulomb blockade threshold, we find that absorption dominates, which leads to cooling corresponding to an average vibron population of the fundamental bending mode of 0.2.

carbon nanotubes

systems

Författare

Fabio Santandrea

Göteborgs universitet

Leonid Gorelik

Chalmers, Teknisk fysik, Kondenserade materiens teori

Robert I. Shekhter

Göteborgs universitet

Mats Jonson

Göteborgs universitet

Physical Review Letters

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

Vol. 106 18

Ämneskategorier

Fysik

DOI

10.1103/PhysRevLett.106.186803