DPG Phi
Verhandlungen
Verhandlungen
DPG

Dresden 2014 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

TT: Fachverband Tiefe Temperaturen

TT 98: Transport: Nanomechanics

TT 98.3: Talk

Thursday, April 3, 2014, 15:30–15:45, BEY 81

Cooling a nanomechanical resonator using spin-dependent transport — •Pascal Stadler1, Gianluca Rastelli2, and Wolfgang Belzig11Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany — 2Zukunftskolleg, Fachbereich Physik, Universität Konstanz, 78457, Konstanz, Germany

We study spin-dependent transport in a quantum dot contacted to two ferromagnets and magnetically coupled to a nanomechanical oscillator in the quantum regime. Due to the magneto-vibrational coupling, the nanomechanical oscillator induces spin-flips of the electrons on the quantum dot. In such a spin-valve, owing to the sensitivity of the electron transport to the spin orientation, signatures of the nanomechanical motion appears in the I-V characteristic even for weak spin-vibrational coupling. Additionally, the feed-back action of the spin-polarized current on the state of the oscillator leads to an active cooling of the oscillator’s eigenmode controlled by the applied voltage to the leads and by the parallel or antiparallel magnetization configuration.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2014 > Dresden