Nanomechanics driven by Andreev tunneling
Artikel i vetenskaplig tidskrift, 2020

We predict and analyze mechanical instability and corresponding self-sustained mechanical oscillations occurring in a nanoelectromechanical system composed of a metallic carbon nanotube (CNT) suspended between two superconducting leads and coupled to a scanning tunneling microscope (STM) tip. We show that such phenomena are realized in the presence of both the coherent Andreev tunneling between the CNT and superconducting leads, and an incoherent single electron tunneling between the voltage biased STM tip and CNT. Treating the CNT as a single-level quantum dot, we demonstrate that the mechanical instability is controlled by the Josephson phase difference, relative position of the electron energy level, and the direction of the charge flow. It is found numerically that the emergence of the self-sustained oscillations leads to a substantial suppression of DC electric current.

Författare

Parafilo

Institute for Basic Science - Korea (IBS)

Leonid Gorelik

Chalmers, Fysik

Fistul

Ruhr-Universität Bochum

Institute for Basic Science - Korea (IBS)

National University of Science & Technology (MISIS)

H. C. Park

Institute for Basic Science - Korea (IBS)

Shekhter

Göteborgs universitet

PHYSICAL REVIEW B

2469-9950 (ISSN) 2469-9969 (eISSN)

Vol. 102 23 235402

Ämneskategorier

Annan fysik

Fusion, plasma och rymdfysik

Den kondenserade materiens fysik

DOI

10.1103/PhysRevB.102.235402

Mer information

Senast uppdaterat

2020-12-17