We use a dual gated device structure to introduce a gate-tuneable periodic potential in a GaAs/AlGaAs two dimensional electron gas (2DEG). Using only a suitable choice of gate voltages we can controllably alter the potential landscape of the bare 2DEG, inducing either a periodic array of antidots or quantum dots. Antidots are artificial scattering centers, and therefore allow for a study of electron dynamics. In particular, we show that the thermovoltage of an antidot lattice is particularly sensitive to the relative positions of the Fermi level and the antidot potential. A quantum dot lattice, on the other hand, provides the opportunity to study correlated electron physics. We find that its current-voltage characteristics display a voltage threshold, as well as a power law scaling, indicative of collective Coulomb blockade in a disordered background.
Skip Nav Destination
Article navigation
4 December 2013
THE PHYSICS OF SEMICONDUCTORS: Proceedings of the 31st International Conference on the Physics of Semiconductors (ICPS) 2012
29 July–3 August 2012
Zurich, Switzerland
Research Article|
December 04 2013
Electrostatic modulation of periodic potentials in a two-dimensional electron gas: From antidot lattice to quantum dot lattice
Srijit Goswami;
Srijit Goswami
Department of Physics, Indian Institute of Science, Bangalore 560 012,
India
Search for other works by this author on:
Mohammed Ali Aamir;
Mohammed Ali Aamir
Department of Physics, Indian Institute of Science, Bangalore 560 012,
India
Search for other works by this author on:
Saquib Shamim;
Saquib Shamim
Department of Physics, Indian Institute of Science, Bangalore 560 012,
India
Search for other works by this author on:
Christoph Siegert;
Christoph Siegert
Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE,
United Kingdom
Search for other works by this author on:
Michael Pepper;
Michael Pepper
Department of Electrical and Electronic Engineering, University College, London WC1E 7JE,
United Kingdom
Search for other works by this author on:
Ian Farrer;
Ian Farrer
Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE,
United Kingdom
Search for other works by this author on:
David A. Ritchie;
David A. Ritchie
Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE,
United Kingdom
Search for other works by this author on:
Arindam Ghosh
Arindam Ghosh
Department of Physics, Indian Institute of Science, Bangalore 560 012,
India
Search for other works by this author on:
AIP Conf. Proc. 1566, 257–258 (2013)
Citation
Srijit Goswami, Mohammed Ali Aamir, Saquib Shamim, Christoph Siegert, Michael Pepper, Ian Farrer, David A. Ritchie, Arindam Ghosh; Electrostatic modulation of periodic potentials in a two-dimensional electron gas: From antidot lattice to quantum dot lattice. AIP Conf. Proc. 4 December 2013; 1566 (1): 257–258. https://doi.org/10.1063/1.4848383
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
38
Views
Citing articles via
Inkjet- and flextrail-printing of silicon polymer-based inks for local passivating contacts
Zohreh Kiaee, Andreas Lösel, et al.
Effect of coupling agent type on the self-cleaning and anti-reflective behaviour of advance nanocoating for PV panels application
Taha Tareq Mohammed, Hadia Kadhim Judran, et al.
Design of a 100 MW solar power plant on wetland in Bangladesh
Apu Kowsar, Sumon Chandra Debnath, et al.
Related Content
Thermoelectric properties of electrostatically tunable antidot lattices
Appl. Phys. Lett. (September 2010)
Ballistic electron transport in structured suspended semiconductor membranes
AIP Conference Proceedings (December 2013)
New edge magnetoplasmon interference like photovoltage oscillations and their amplitude enhancement in the presence of an antidot lattice
AIP Advances (November 2015)
Electric field modulation of thermovoltage in single-layer MoS2
Appl. Phys. Lett. (December 2014)
The effect of Coulomb interactions on nonlinear thermovoltage and thermocurrent in quantum dots
J. Chem. Phys. (June 2015)