Home > Articles > Published articles > Cooling and self-oscillation in a nanotube electromechanical resonator |
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 |
Preprint 24 p, 2.5 MB |