__Carbotronics___{}

** **

**Funding
scheme:**

7th Framework Programme of the European Union (7FP EU)

Support
for Training and Career Development of Researchers (Marie Curie)

Intra-European Fellowship (IEF)

**Call
identifier:**

FP7-PEOPLE-2007-2-1-IEF

**Title:**

Opto-electronic
properties of graphene and other carbon nanostructures

**Acronym:**

** **Carbotronics

**Grant
agreement:**

** **PIEF-GA-2008-221701

**Duration:**

24 months (1 Sep 2008 – 31 Aug 2010)

**Host:**

University
of Cambridge

Cavendish Laboratory (Department of
Physics)

Theory of Condensed Matter Group

**Supervisor:**

Prof. Peter Littlewood, Head of
Department

**Researcher:**

Prof. Arkadiusz Wójs (arkadiusz.wojs@pwr.edu.pl)

**Abstract:**

Project covers theoretical/computational studies of
optoelectronic properties of graphene and other carbon-based nanostructures,
aimed at both fundamental effects and application in future graphene
nanotechnology. Major goals are: (i) learning new, powerful methods of
electronic-structure calculations (quantum Monte Carlo and density functional
theory) and their application for graphene nanostructures; (ii) learning
methods of field theory and combining them with extensive present expertise for
the studies of many-body effects in electronic and optical response, with
expected application in novel nanodevices; (iii)
learning complementary skills for establishment of home interdisciplinary
research group focused on nanoscience/nanotechnology
of new structures/materials and integrated with big EU research programmes (leadership skills, acquiring funds, project management,
work in collaboration); (iv) acquintance with (and
import of) teaching methods/practices (excellence in this academic skill being
crucial for Applicant’s promotion to a full professor upon return). Project’s
success relies on Applicant’s present potential/experience (mostly in
fundamental research, but also in teaching and leadership) and on superb
quality of the host (Cambridge in general, Cavendish Laboratory in particular)
in all essential aspects (research, participation in European science, and
teaching). The main results will be: (i) multi-aspectual individual education
of the Applicant (at a rate possible only due to continuous interaction with
Europe’s best specialists and exposure to unparalleled academic environment) as
well as (ii) enhancement of attractiveness and potential of European science by
means of transfer of knowledge and research/academic habits from the leading
European university to a major but still rapidly developing research/academic
institution in Poland and (iii) efficient incorporation of the latter in
priority EU research programmes.

**Collaboration:**

Gunnar Möller and Nigel R. Cooper (University of
Cambridge, UK)

Steven H. Simon (University of Oxford, UK)

John J. Quinn (University of Tennessee, USA)

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)

Karel Vyborny (Academy of Sciences, Czech Republic)

Rolf Haug (Leibnitz
University of Hannover,
Germany)

Ganesh Jaya Sreejith (NORDITA, Sweden)

Csaba Tőke (University of Pécs, Hungary)

Marek Potemski (French National High Magnetic Field
Laboratory of Grenoble, France)

Paulina Plochocka (French
National High Magnetic Field Laboratory of Toulouse, France)

Dirk Reuter and Andreas D. Wieck (Ruhr Universität
Bochum, Germany)

**Major
accomplishments:**

Analysis of
fractional quantum Hall effect in half-filled Landau levels of graphene

Evidence for
non-Abelian quantum statistics in certain fractional quantum Hall states in the
lowest Landau level

Comparison of
electron-electron correlations at corresponding fractional fillings of first
and second Landau level

Theory of spin
dynamics in the half-filled second Landau level (filling factor 5/2)

Analysis of Landau
level mixing in the 5/2 state of fractional quantum Hall effect

**Publications:**

No. |
Authors |
Title |
Journal reference |
Impact |

1 |
A. Wójs |
Numerical evidence for non-Abelian
quantum liquids in the lowest Landau level |
Physical Review B |
3.767 |

2 |
K. Vyborny, A. F. Dethlefsen,
R. J. Haug, and A. Wójs |
Charge-spin excitations of the
Ising-type fractional quantum Hall ferromagnets |
Physical Review B |
3.767 |

3 |
A. Wójs |
Transition from Abelian to non-Abelian
quantum liquids in the second Landau level |
Physical Review B |
3.767 |

4 |
G. Möller, A. Wójs, and N. R. Cooper |
Fractional quantum Hall states with
non-Abelian statistics |
Acta Physica Polonica A |
0.531 |

5 |
A. Wójs, G. Möller, S. H. Simon, and N.
R. Cooper |
Skyrmions in the Moore-Read state at
ν=5/2 |
Physical Review Letters |
7.943 |

6 |
A. Wójs, C. Tőke,
and J. K. Jain |
Global phase diagram of the fractional
quantum Hall effect arising from repulsive three-body interactions |
Physical Review Letters |
7.943 |

7 |
A. Wójs, C. Tőke,
and J. K. Jain |
Landau level mixing and the emergence of
Pfaffian excitations for the 5/2 fractional quantum Hall effect |
Physical Review Letters |
7.943 |

8 |
A. Wójs |
Search for electron liquids with
non-Abelian quasiparticles |
Journal of Physics: Conference Series |
0.000 |

9 |
G. Möller, A. Wójs, and N. R. Cooper |
Neutral fermion excitations in the
Moore-Read state at ν=5/2 |
Physical Review Letters |
7.943 |

10 |
A. Wójs, G. Möller, and N. R. Cooper |
Composite fermion dynamics in
half-filled Landau levels of graphene |
Acta Physica Polonica A |
0.531 |

11 |
J. Jadczak, L. Bryja, A. Wójs, G. Bartsch, D.R. Yakovlev, M. Bayer, P. Plochocka,
M. Potemski, D. Reuter, and A. Wieck |
Exciton exchange between nearly-free and
acceptor-bound states of a positive trion assisted by cyclotron excitation |
Acta Physica Polonica A |
0.531 |

12 |
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 |

13 |
J. Jadczak, L. Bryja, A. Wójs, G. Bartsch, D. R. Yakovlev, M. Bayer, P. Plochocka,
M. Potemski, D. Reuter, and A. Wieck |
Strong temperature destabilization of
free exciton recombination in a two-dimensional structures with hole gas |
Journal of Physics: Conference Series |
0.000 |

14 |
A. Wójs, G. Möller, and N. R. Cooper |
Search for non-Abelian statistics in
half-filled Landau levels of graphene |
Journal of Physics: Conference Series |
0.000 |

15 |
J. Jadczak, L. Bryja, A. Wójs, G. Bartsch, D. R. Yakovlev, M. Bayer, P. Plochocka,
and M. Potemski |
Cyclotron-assisted exciton hopping
between free and acceptor-bound trions observed in magneto-photoluminescence
of a two-dimensional hole gas |
AIP Conference Proceedings |
0.000 |

16 |
A. Wójs, G. Möller, S. H. Simon, and N.
R. Cooper |
Skyrmions in a half-filled second Landau
level |
AIP Conference Proceedings |
0.000 |

**Invited
talks:**

No. |
Authors |
Title |
Conference |
Place |
Dates |

1 |
A. Wójs |
Recombination of free and impurity-bound
2D magneto-trions |
International
Workshop on Optics of Nanostructures |
Toruń, |
10-11 |

2 |
A. Wójs |
Incompressible quantum liquids with non-Abelian
quasiparticles |
International Workshop on Semiconductor
and carbon-based nanostructures in magnetic fields |
Grenoble, |
24-26 |

3 |
A. Wójs |
Search for electron liquids with
non-Abelian quasiparticles |
10th International School on Theoretical
Physics “Symmetry and Structural Properties of Condensed Matter” |
Myczkowce, |
2-9 |

4 |
A. Wójs |
Toward topological quantum computing:
Skyrmions in a half-filled second Landau level |
Canada-Poland-Japan International
Symposium on Semiconductor, Magnetic and Photonic Nanostructures |
Wrocław, |
4-8 |

5 |
A. Wójs |
Composite fermion phases in graphene:
Search for non-Abelian quasiparticles |
Semiconductor Materials for Information
Technology, Marie Curie Fellowship for Transfer of Knowledge, Concluding
Workshop |
Warszawa, |
7-8 |

6 |
A. Wójs |
Fractional quantum Hall effect arising
from a repulsive three body interaction |
3rd Annual UK-NL Condensed Matter
Meeting |
Cambridge, |
2-3 |

7 |
A. Wójs |
Fractional quantum Hall effect for a
repulsive three body interaction |
34th International Conference of Theoretical
Physics “Correlations and Coherence at Different Scales” |
Ustroń, |
3-8 |