Quantum Electronic Devices


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QED group December 2012 (Photo: Mike Gal)

The QED group

The Quantum Electronic Devices group is part of the Condensed Matter Department in UNSW's School of Physics in the heart of Sydney. Our research is focussed on studying the fundamental properties of low dimensional systems realised in advanced semiconductor devices, and developing new organic semiconductor and superconducting devices.

What's new

19 February 2014
Another theory paper, in collaboration with colleagues in Italy, has appeared in Physical Review B Rapid Communications: Excitonic superfluidity and screening in electron-hole bilayer systems, by Perali, Neilson and Hamilton. The calculations show that electron-hole superfluidity can be achieved in double bilayer graphene devices, and answers a longstanding question about the suppression of superfluid pairing by screening (and vice versa).
10 February 2014
Welcome to new Honours student Scott Liles.
7 February 2014
Congratulations to Ashwin Srinivasan for winning a best poster prize at the 2014 Wagga Wagga meeting in Waiheke Island.
4 February 2014
Alex, Ashwin and LaReine are off to Waiheke island in New Zealand for the 2014 Wagga Wagga meeting, where LaReine is going to talk about her recent work on quantum dots.
3 February 2014
Oleh is off to Adelaide for the 2014 ICONN conference, where he is giving a talk on Hole Landau Level Spin Diodes.
7 January 2014
Congratulations to Sarah, Andrew, Zach and Pat - their paper showing that high frequency measurements of undoped quantum dots are possible, despite what lumped circuit models predict, has just appeared in Applid Physics Letters:
S. J. MacLeod, A. M. See, Z. K. Keane, P. Scriven, A. P. Micolich, M. Aagesen, P. E. Lindelof and A. R. Hamilton, Radio-frequency reflectometry on an undoped AlGaAs/GaAs single electron transistor, Appl. Phys. Lett. 104, 012114 (2014). It's also available on the arxiv preprint server.
25-29 November 2013
The School of Physics is hosting the 2013 Gordon Godfrey Workshop on Spins and Strong Correlations.
18 November 2013
Prof. Sir Michael Pepper from University College London is visiting for 2 weeks.
11 November 2013
Prof. Marco Polini, NEST, Istituto Nanoscienze-CNR, Pisa, Italy, is visiting the group for 3 weeks.
17 October 2013
Congratulations to Andrew See - his paper studying suppression of ground state transport in a GaAs induced n-type quantum dot has been accepted for publication in the Journal of Physics: Condensed Matter ("A study of transport suppression in an undoped AlGaAs/GaAs single-electron transistor" by A. M. See, O. Klochan, A. P. Micolich, M. Aagesen, P. E. Lindelof and A. R. Hamilton).
8 November 2013
Dr. Oleh Klochan has won an ARC Discovery Early Career Fellowship to study advanced nanostructured devices - way to go Oleh! In addition our collaboration with researchers in Electrical Engineering at UNSW, as well as colleagues at Monash and LaTrobe, was awarded a $560,000 Linkage Infrastructure grant to set up a scanning gate microscope facility.
8 October 2013
Congratulations to Roy Li - his paper reporting the first silicon hole quantum dot compatible with conventional MOS technology has been accepted for publication in Applied Physics Letters ("Single Hole Transport in a Silicon Metal-Oxide-Semiconductor Quantum Dot").
28 August 2013
Welcome to new PhD student Elizabeth Marcellina.
1-5 July 2013
Daisy, Oleh, Roy and Alex are all presenting work at the 20th International Conference on Electronic Properties of Two-Dimensional Systems (EP2DS-20) in the rather pretty town of Wroclaw, Poland. Alex's talk on compressibility studies of the "0.7 anomaly" in one-dimensional quantum wires was apparently listed as one of the conference highlights.
17 May 2013
Congratulations to Daisy Wang on getting her paper accepted into Physical Review B. Daisy has shown that you can try to remove disorder from ultra-clean devices, but there's no such thing as a free lunch: Influence of surface states on quantum and transport lifetimes in high-quality undoped heterostructures D. Q. Wang, J. C. H. Chen, O. Klochan, K. Das Gupta, D. Reuter, A.D. Wieck, D. A. Ritchie, and A. R. Hamilton.
15 May 2013
Welcome to PhD student Shun-Tsung Lo, visiting from Prof. Liang's group at the National Taiwan University. Shun-Tsung will be working with Oleh Klochan for the next 7 months on transport in atomically thin crystals.
14 May 2013
Congratulations to Oleh Klochan - his latest paper on the Kondo effect in hole quantum dots has just been published as a Rapid Communication in Physical Review B. The paper is a result of a really nice collaboration Oleh has set up with theorists in Germany, to compare experimental and theoretical finite temperature scaling of the zero bias conductance peak. The preprint is available here: Scaling of the Kondo zero-bias peak in a hole quantum dot at finite temperatures, by O. Klochan, A. P. Micolich, A. R. Hamilton, D. Reuter, A. D. Wieck, F. Reininghaus, M. Pletyukhov, H. Schoeller.
11 April 2013
A collaboration between the QED group and Andrew Dzurak's group in ANFF has demonstrated the first silicon single hole transistor using standard CMOS technology. The paper, "Single Hole Transport in a Silicon Metal-Oxide-Semiconductor Quantum Dot" by Roy Li, Fay Hudson, Andrew Dzurak and Alex Hamilton is available on the preprint archive.
7 April 2013
Andrew See is off to Italy, to attend the 2013 Capri Spring School on Transport in Nanostructures.
6 March 2013
Another paper in Physical Review Letters, this time with our collaborators in Italy. Our prediction of artificially engineered superfluidity of electron-hole pairs in graphene samples has just been accepted for publication. The preprint is available here: High Temperature Superfluidity in Double Bilayer Graphene, by Andrea Perali, David Neilson, and Alex Hamilton.
5 March 2013
Congratulations to Oleh Klochan and our collaborators in Cambridge: the paper "Ultra-shallow quantum dots in an undoped GaAs/AlGaAs 2DEG" by W. Y. Mak, F. Sfigakis, K. Das Gupta, O. Klochan, H. E. Beere, I. Farrer, J. P. Griffiths, G. A. C. Jones, A. R. Hamilton, and D. A. Ritchie has just been accepted for publication in Applied Physics Letters.
15 February 2013
Welcome to new Honours student Matthew Rendell.
21 January 2013
Mark Edmonds, from LaTrobe University, is visiting the QED group once more.
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Updated: February 19, 2014