DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2015 – scientific programme

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

HL: Fachverband Halbleiterphysik

HL 106: Transport, magnetotransport and quantum Hall physics

HL 106.5: Talk

Friday, March 20, 2015, 11:00–11:15, EW 202

Voltage fluctuation to current converter with coupled quantum dots — •Pierre Pfeffer1, Fabian Hartmann1, Sven Höfling1, 2, Martin Kamp1, and Lukas Worschech11Technische Physik, Physikalisches Institut, Universität Würzburg and Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Am Hubland, D-97074 Würzburg, Germany — 2SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews, KY16 9SS, United Kingdom

Converting random fluctuations into useful energy is a major challenge in electronics and has triggered substantial experimental and theoretical work ranging from solid state to biological systems from the classical down to the quantum regime. Following recent proposals by Sothmann, Sanchez, Jordan and Büttiker [1,2], we realized a Coulomb-coupled quantum dot (QD) system and demonstrate a direct current in one part of the QD circuit due to charge fluctuations in the other part of the QD circuit. Both the direction and the amplitude of the current can be switched by an electric field superimposed on the open QD. No particle exchange between the two QD subsystems is involved and dependent on the noise amplitude, maximum output powers are found in the pW region.

[1] R. Sanchez and M. Büttiker, Phys. Rev. B 83, 085428 (2011).

[2] B. Sothmann, R. Sanchez, A. N. Jordan and M. Büttiker, Phys. Rev. B 85, 205301 (2012).

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2015 > Berlin