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TT: Fachverband Tiefe Temperaturen
TT 3: Transport: Fluctuations and Noise
TT 3.9: Talk
Monday, February 25, 2008, 12:15–12:30, H 2053
Vibrational coherences in tunneling through nanoscale oscillators — Hannes Hübener1 and •Tobias Brandes2 — 1Laboratoire des Solides Irradiés, Ecole Polytechnique, 91128 Palaiseau, France — 2Institut für Theoretische Physik, Technische Universität Berlin, D-10623 Berlin, Germany
Charging a nano-scale oscillator by single electron tunneling leads to an effective double-well potential due to image charges. We combine exact numerical diagonalizations with generalized Master equations and show [1] that the resulting quantum tunneling of the mechanical degree of freedom can be visualized in the electronic current noise spectrum.
[1] H. Hübener, T. Brandes; Phys. Rev. Lett. xxx (2007).