Surface-Acoustic-Wave-Induced Transport in a Double Quantum Dot

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W. J. M. Naber,^1,2,3 T. Fujisawa,^2,4 H. W. Liu,^2,5 and W. G. van der Wiel^1,6
¹SRO NanoElectronics, MESA⁺ Institute for NanoTechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
²NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
³Kavli Institute of NanoScience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, The Netherlands
⁴Tokyo Institute of Technology, 2-12-1 Okayama, Meguro-ku, Tokyo 152-8551, Japan
⁵SORST-JST, 4-1-8 Honmachi, Kawaguchi, Saitama 331-0012, Japan; National Laboratory of Superhard Materials, Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
⁶PRESTO-JST, 7-3-1, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

Received 9 January 2006; published 7 April 2006

Wereport on nonadiabatic transport through a double quantum dot underirradiation of surface acoustic waves generated on chip. At lowexcitation powers, absorption and emission of single and multiple phononsare observed. At higher power, sequential phonon assisted tunneling processesexcite the double dot in a highly nonequilibrium state. Thepresent system is attractive for studying electron-phonon interaction with piezoelectriccoupling.

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.96.136807
DOI:	10.1103/PhysRevLett.96.136807
PACS:	73.23.Hk; 63.20.Kr; 77.65.Dq 73.23.Hk Coulomb blockade; single-electron tunneling 63.20.Kr Phonon–electron and phonon–phonon interactions 77.65.Dq Acoustoelectric effects and surface acoustic waves (SAW) in piezoelectrics YEAR: 2006
KEYWORDS:	surface acoustic waves, quantum dots, electron-phonon interactions, resonant tunnelling, piezoelectricity

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