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

 

21 December 2012

Another paper in Nanoletters! Congratulations to Ashwin and LaReine on the acceptance of their paper "Using a tunable quantum wire to measure the large out-of-plane spin splitting of quasi two-dimensional holes in a GaAs nanostructure". Just in time for Christmas.

 

14 & 17 December 2012

The QED group is attending a two-day workshop, CMP at the Coogee Bay for Condensed Matter Physicists in the Sydney region. Anyone interested is welcome to attend this relaxed, no-fee workshop at the spectacular Coogee Bay Hotel. Registration is free.

Roy, Ashwin, Daisy, LaReine, Andrew and Oleh all gave excellent talks at the Coogee Bay workshop - well done.

 

13 December 2012

Daisy Wang and Alex Hamilton are giving talks at the 2012 AIP Congress in Sydney.

 

12 December 2012

Oleh Klochan is giving at talk on his measurements of the Kondo effect in hole systems at the COMMAD conference in Melbourne.

 

10-14 December 2012

Prof Barbaros Özyilmas, from the Graphene Research Centre at the National University of Singapore, is visiting the group.

 

3 December 2012

Alex Hamilton is awarded a UNSW Scientia Professorship, which is UNSW's most prestigious Professorship.

 

5 November 2012

QED group and collaborators win two large infrastructure grants.
Well done to our collaborator Dane McCamey at the University of Sydney, who has won an $860,000 grant for a new electron spin resonance system.

Prof Nagarajan Valanoor in the School of Materials Science and Engineering, Prof. Hamilton in QED and collaborators at UNSW at ISEM in Wollongong, have also won a $200,000 grant for a new characterisation facility for advanced materials and devices.

 

26-27 July 2012

Professor Michael Kelly FRS FReng from the University of Cambridge is visiting the group.

 

13 July 2012

Welcome to new Honours student Karina Hudson.

 

11 July 2012

Congratulations to Dr. Jason Chen on the award of his PhD.

 

4 July 2012

Last drinks gentlemen please! Today is Jason's last day at UNSW. He'll soon be heading off to join Professor Fujisawa's laboratory at the Tokyo Institute of Technology as a postdoctoral researcher. Drinks at the Rege....

 

23 May 2012

Much as we try to eliminate disorder in quantum devices, it is always there, and can sometimes have significant and unexpected effects, as this latest publication, in collaboration with the Universities of Oregon, Lund and Nottingham, shows:
Probing the sensitivity of electron wave interference to disorder-induced scattering in solid-state devices, B. C. Scannell, I. Pilgrim, A. M. See, et al, Physical Review B 85, 195319 (2012)

 

13 April 2012

Congratulations to Dr. Andrew See on the award of his PhD. Sounds like it's time to head for Drinks at the Rege....

 

31 March 2012

Another paper accepted for Physical Review Letters! Andrew See, Adam Micolich and co-workers show a new route to making incredibly stable quantum devices, and use magentoconductance fluctuations to provide a unique fingerprint of the random disorder in the device. Their results show for the first time that it is now possible to make devices behave identically before and after thermal cycling to room temperature.
"Impact of Small-Angle Scattering on Ballistic Transport in Quantum Dots" Phys. Rev. Lett. 108, 196807 (2012).

 

30 Jan 2012

Congratulations to Jason Chen and Daisy Wang - their paper "Fabrication and characterization of ambipolar devices on an undoped AlGaAs/GaAs heterostructure", in which they report a new way of making quantum devices that can be switched from electrons to holes simply by changing a gate bias, has appeared in Applied Physics Letters. A very interesting piece of work that shows how little we know about holes.

 

26 Oct 2011

The Vector Field Facility was officially opened by UNSW's DVC(R), Prof. Les Field, and the Dean of Science Prof. Merlin Crossley. Some photos are here.

 

24-28 Oct 2011

The 2011 Gordon Godfrey workshop on Spins and Strong Correlations was held at UNSW this year, with numerous international visitors spending time in the group. Some Photos are here.

 

5 Sept 2011

Summer Vacation Scholarships valued at $3,800 each are available for high achieving higher year undergraduates to work in the QED laboratories over the Summer break. Details are available at www.science.unsw.edu.au/summer-scholarships. Applicants should contact Prof. Hamilton or Dr. Klochan. The closing date for applications is 7October 2011.

 

18 August 2011

Another paper in Physical Review Letters! Luke Smith from the University of Cambridge visited the QED group for 2 months last year to perform low temperature studies of the compressibility of one dimensional electron systems. The resulting paper Compressibility measurements of quasi-one-dimensional quantum wires has been accepted for publication in PRL.

 

15 August 2011

Ashwin, LaReine and Oleh are off to the UK to work at the University of Cambridge for 4 weeks. They will be making new devices in the semiconductor clean rooms there. Have a good trip!

 

25 July 2011

Welcome to new PhD student Daisy Wang. Daisy did an Honours project in the group, and is now looking at some of the strange (and not yet understood) scattering properties of holes in nanostructures.

 

25 July 2011

Ashwin and Alex are in Florida attending the 19th International Conference on the properties of two dimensional systems, as well as presenting a talk and four posters.

 

15 July 2011

Oleh Klochan's preprint reporting the first observation of Kondo effect in a spin-3/2 hole system is accepted for publication in Physical Review Letters (see also the preprint on the cond-mat arXiv: "Anisotropic Kondo effect in a spin-3/2 hole quantum wire"). Well done Oleh! Time for a slab (of beer) in the lab.

 

8 July 2011

PhD student LaReine Yeoh wins a Nanotechnology Network scholarship to travel to the UK. She'll be working at theUniversity of Cambridge, making and testing some new devices with our collaborators in the Cavendish Laboratory.

 

5 July 2011

Congratulations to Zach and Matt on the acceptance of their paper "Resistively Detected Nuclear Magnetic Resonance in n- and p-Type GaAs Quantum Point Contacts" for publication in Nano Letters. As Zach put it - "Drinks at the Rege?"

 

28 June 2011

Another preprint is posted on the arXiv: This time Andrew demonstrates the critical (and often ignored) role of disorder in "ballistic" devices: "Probing the Sensitivity of Electron Wave Interference to Disorder-Induced Scattering in Solid-State Devices"

 

17 Feb 2011

Welcome to new Honours students Spencer Russett and Pat Scriven, and new PhD student Roy Li.

 

17 Jan 2011

Installation of the new vector field fridge has begun - see here for details and timelapse video.

 

12 Jan 2011

Welcome to new PhD student Sarah MacLeod, and congratulations to last years Honours students Matt Godfrey and David Waddington, both getting first class Honours.

 

1 Jan 2011

Congratulations to Dr. Oleh Klochan and Dr. Zach Keane on the award of their UNSW Early Career Researcher grant.

 

 

 

 

 

 

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