Cooling and self-oscillation in a nanotube electromechanical resonator
Urgell, C. (Institut de Ciències Fotòniques)
Yang, Wei (Institut de Ciències Fotòniques)
De Bonis, Sergio Lucio (Institut de Ciències Fotòniques)
Samanta, Chandan (Institut de Ciències Fotòniques)
Esplandiu Egido, Maria José (Institut Català de Nanociència i Nanotecnologia)
Dong, Q. (Université Paris-Saclay. Centre de Nanosciences et de Nanotechnologies)
Jin, Y. (Université Paris-Saclay. Centre de Nanosciences et de Nanotechnologies)
Bachtold, Adrian (Institut de Ciències Fotòniques)

Date:	2020
Abstract:	Nanomechanical resonators are used with great success to couple mechanical motion to other degrees of freedom, such as photons, spins and electrons. The motion of a mechanical eigenmode can be efficiently cooled into the quantum regime using photons, but not other degrees of freedom. Here, we demonstrate a simple yet powerful method for cooling, amplification and self-oscillation using electrons. This is achieved by applying a constant (d. c. ) current of electrons through a suspended nanotube in a dilution refrigerator. We demonstrate cooling to 4. 6 ± 2. 0 quanta of vibrations. We also observe self-oscillation, which can lead to prominent instabilities in the electron transport through the nanotube. We attribute the origin of the observed cooling and self-oscillation to an electrothermal effect. This work shows that electrons may become a useful resource for cooling the mechanical vibrations of nanoscale systems into the quantum regime.
Grants:	European Commission 692876 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1664 Ministerio de Economía y Competitividad SEV-2015-0522 Ministerio de Ciencia e Innovación RTI2018-097953-B-I00
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Dilution refrigerator ; Electro-thermal effects ; Electromechanical resonators ; Electron transport ; Mechanical motions ; Nano-scale system ; Nanomechanical resonators ; Self-oscillations
Published in:	Nature Physics, Vol. 16 (2020) , p. 32-37, ISSN 1745-2481

DOI: 10.1038/s41567-019-0682-6

Preprint 24 p, 2.5 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles