ExoticPhases4QIT_{}
Funding
scheme:
7th Framework Programme of the European Union (7FP EU)
Support
for Training and Career Development of Researchers (Marie Curie)
Career Integration Grant (CGI)
Call
identifier:
FP7PEOPLE2011CIG
Title:
Exotic
quantum phases in graphene and other modern nanomaterials
– physical foundation for quantum information technology
Acronym:
ExoticPhases4QIT
Grant
agreement:
PCIG09GA2011294186
Duration:
48 months (1 Sep 2011 – 31 Aug 2015)
Host:
Wroclaw
University of Technology
Faculty of Fundamental Problems in
Technology
Institute of Physics
Supervisor:
Prof. Jan Misiewicz,
Head of Institute
Researcher:
Prof. Arkadiusz Wójs (arkadiusz.wojs@pwr.edu.pl)
Abstract:
Project
covers theoretical/computational studies of exotic phases of quantum matter
(especially with fractional and nonAbelian quantum statistics) in graphene and other modern nanomaterials.
It is aimed at both fundamental effects and application in future graphene
nanotechnology (especially in quantum information technology, via the concept
of topological quantum computation). Major goals are: (i) implementing powerful
computational methods acquired during the preceding IEF (large scale
configuration interaction, quantum Monte Carlo, density functional theory) for
application in modelling electronic structure and manybody effects in
nanostructures; (ii) understanding new manybody effects in lowdimensional
systems (especially those related to emergence of exotic electronic phases),
applicable in quantum information technology; (iii) building a research group
focused on nanoscience/nanotechnology, benefitting from collaboration with
University of Cambridge established during the IEF.
Project’s
success relies on Applicant’s experience (mostly in fundamental research, but
also in teaching and leadership), previous and gained during the preceding IEF,
and on superb quality of research groups with whom collaboration has been
established during the IEF (Cambridge, Oxford, Penn State).
The
main results will be: (i) improved understanding of the studied phenomena; (ii)
shared collaboration between group at host institution (WrUT) and host of
previous IEF (Cambridge), including student/lecturer exchange and joint
research.
Collaboration:
Gunnar
Möller and Nigel R. Cooper (University of Cambridge, UK)
Jainendra
K. Jain (Pennsylvania State University, USA)
Pawel
Hawrylak (National Research Council, Canada)
Leszek
Bryja (Wroclaw University of Technology)
Manfred
Bayer and Dmitri Yakovlev (Technical University of Dortmund, Germany)
Ganesh
Jaya Sreejith (NORDITA, Sweden)
Csaba Tőke
(University of Pécs, Hungary)
Sudhansu Sekhar
Mandal (Indian Association for the Cultivation of Science)
Marek
Potemski (French National High Magnetic Field Laboratory of Grenoble, France)
Paulina
Plochocka (French National High Magnetic Field
Laboratory of Toulouse, France)
Devrim Güçlü
(Izmir Institute of Technology, Turkey)
Dirk
Reuter and Andreas D. Wieck (Ruhr Universität Bochum, Germany)
Major
accomplishments:
Theory of magnetism
in fewelectron triangular graphene nanoislands
Multipartite
composite fermion description of certain fractional quantum Hall states
Identification of composite
fermion pairing in fractional quantum Hall state 3/8
Numerical
demonstration of adiabatic continuity between fractional quantum Hall states
1/3 and 7/3
Experimental
demonstration and understanding of combined cyclotronexciton processes in
quantum wells
Research
group:
Pawel Potasz, PhD (pawel.potasz@pwr.edu.pl)
Błażej Jaworowski, MSc
Anna Piekarska, MSc
(now at INTiBS
PAN Wrocław)
Ludmiła Szulakowska,
MSc (now at University of Ottawa)
Paweł Bugajny, MSc
Maciej Bieniek, MSc
Marta Brzezińska, MSc
Bartosz Kuśmierz, MSc
Marcin Wcisło, MSc
Publications:
No. 
Authors 
Title 
Journal 
Impact 
1 
A. Wójs, G. J. Sreejith, G. Möller, C. Tőke, and J. K. Jain 
Composite fermion
description of the excitations of the paired Pfaffian
fractional quantum Hall state 
Acta Physica Polonica
A 
0.531 
2 
G. J. Sreejith, C. Tőke, A. Wójs, and J. K. Jain 
Bipartite composite fermion states 
Physical Review
Letters 
7.943 
3 
G. J. Sreejith, A.
Wójs, and J. K. Jain 
Unpaired composite fermion, topological exciton, and zero mode 
Physical Review
Letters 
7.943 
4 
P. Potasz, A. D. Güçlü, A. Wójs, and P. Hawrylak 
Electronic
properties of gated triangular graphene quantum dots: Magnetism,
correlations, and geometrical effects 
Physical Review B 
3.767 
5 
S. Mukherjee, S. S.
Mandal, A. Wójs, and J. K. Jain 
Possible AntiPfaffian Pairing of Composite Fermions at ν=3/8 
Physical Review Letters 
7.943 
6 
J. Jadczak, L.
Bryja, A. Wójs, and M. Potemski 
Optically induced charge conversion of coexistent free and bound excitonic
complexes in twobeam magnetophotoluminescence of twodimensional quantum
structures 
Physical Review B 
3.767 
7 
L. Bryja, J.
Jadczak, A. Wójs, G. Bartsch, D. R. Yakovlev, M.
Bayer, P. Plochocka, M. Potemski, D. Reuter, and A.
D. Wieck 
Cyclotronresonant exciton transfer between the nearly free and
strongly localized radiative states of a twodimensional hole gas in a high
magnetic field 
Physical Review B 
3.767 
8 
A. C. Balram, Y.H.
Wu, G. J. Sreejith, A. Wójs, and J. K. Jain 
Role of exciton screening in the 7/3 fractional quantum Hall effect 
Physical Review
Letters 
7.943 
9 
A. C. Balram, A.
Wójs, and J. K. Jain 
State counting for excited bands of the fractional quantum Hall effect:
Exclusion rules for bound excitons 
Physical Review B 
3.767 
10 
G. J. Sreejith,
Y.H. Wu, A. Wójs, and J. K. Jain 
Tripartite composite fermion states 
Physical Review B 
3.767 
11 
J. Jadczak, L. Bryja, J. Misiewicz, A. Wójs, M. Potemski, F. Liu, D.
R. Yakovlev, M. Bayer, D. Reuter, A. D. Wieck, C. A. Nicoll, I. Farrer, D. A.
Ritchie 
Charge conversion of nearly free and impurity bound magnetotrions immersed in 2D electron or hole gas with optically
tunable concentration 
Journal of Physics: Conference Series 456, 012017
(2013) 
0.000 
12 
S. Mukherjee, S. S.
Mandal, Y.H. Wu, A. Wójs, J. K. Jain 
Enigmatic 4/11 state: A prototype for unconventional fractional
quantum Hall effect 
Physical Review Letters 112, 016801
(2014) 
7.943 
13 
Y. Liu, S. Hasdemir, A. Wójs , J. K. Jain,
L. N. Pfeiffer, K. W. West, K. W. Baldwin, M. Shayegan 
Spin polarization of composite fermions and particlehole symmetry
breaking 
Physical Review B 
3.767 
14 
A. C. Balram, C. Tőke, A. Wójs, J. K. Jain 
Phase diagram of fractional quantum Hall effect of composite fermions
in multicomponent systems 
Physical Review B 
3.767 
15 
A. C. Balram, C. Tőke, A. Wójs, J. K. Jain 
Fractional quantum Hall effect in graphene: Quantitative comparison
between theory and experiment 
Physical Review B 
3.767 
Invited
talks:
No. 
Authors 
Title 
Conference 
Place 
Dates 
1 
A. Wójs 
Bipartite composite
fermion model for the 5/2 fractional quantum Hall state 
Gatlinburg,
Tennessee, USA 
30 Oct 

2 
A. Wójs 
NonAbelian anyon
statistics arising from pairing of composite fermions in fractional quantum
Hall effect 
XVI National
Conference on Superconductivity “Unconventional
superconductivity and strongly correlated systems” 
Zakopane, 
712 
3 
A. Wójs 
On science and scientific method 
9th Students’
Science Conference 
Będlewo, Poland 
79 
4 
A. Wójs 
Composite fermions and topological quantum liquids 
The 11th International School on
Theoretical Physics “Symmetry and
Structural Properties of Condensed Matter” 
Rzeszów, Poland 
16 
5 
A. Wójs 
Theoretical evidence for a new mechanism for FQHE at ν =4/11 
International Workshop
on Emerging Phenomena in Quantum Hall Systems 
Weizmann Institute
of Science, Rehevot, Israel 
79 
6 
A. Wójs 
Emergence of nonAbelian statistics in fractional quantum Hall effect 
The V Jubilee KCIK (National
Quantum Information Centre) Symposium 
Sopot, 
2224 
7 
A. Wójs 
Fractional skyrmions in quantum Hall effect 
Topological Particles
in Condensed Matter Physics An Advanced School
and Topical Workshop 
Pune, 
611 