Probing Bogoliubov Quasiparticles in Superfluid 3He with a ‘Vibrating-Wire Like’ MEMS Device - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Journal of Low Temperature Physics Année : 2016

Probing Bogoliubov Quasiparticles in Superfluid 3He with a ‘Vibrating-Wire Like’ MEMS Device

Résumé

We have measured the interaction between superfluid 3 He-B and a micro-machined goalpost-shaped device at temperatures below 0.2 T c. The measured damping follows well the theory developed for vibrating wires, in which the An-dreev reflection of quasiparticles in the flow field around the moving structure leads to a nonlinear frictional force. At low velocities the damping force is proportional to velocity while it tends to saturate for larger excitations. Above a velocity of 2.6 mms −1 the damping abruptly increases, which is interpreted in terms of Cooper-pair breaking. Interestingly, this critical velocity is significantly lower than reported with other mechanical probes immersed in superfluid 3 He. Furthermore , we report on a nonlinear resonance shape for large motion amplitudes that we interpret as an inertial effect due to quasiparticle friction, but other mechanisms could possibly be invoked as well. PACS numbers: 85.85.+j, 67.30.H-, 67.30.em
Fichier principal
Vignette du fichier
Collin_DV_expt_rev2k.pdf (441.26 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01244629 , version 1 (16-12-2015)

Identifiants

Citer

Martial Defoort, Sébastien Dufresnes, S.L. Ahlstrom, D.I. Bradley, R.P. Haley, et al.. Probing Bogoliubov Quasiparticles in Superfluid 3He with a ‘Vibrating-Wire Like’ MEMS Device. Journal of Low Temperature Physics, 2016, 183 (3), pp.284-291. ⟨10.1007/s10909-015-1392-9⟩. ⟨hal-01244629⟩

Collections

UGA CNRS NEEL
125 Consultations
126 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More