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Research Group "Halbleiter- und Festkörperphysik, JKU Linz"
(Assoc.Univ.Prof. Dr. Alberta Bonanni)

Head of the research group:
Last name:Bonanni
First name(s):Alberta
Title:Assoc.Univ.Prof. Dr.
Position:Group Leader
Institution:
Institution:Johannes Kepler University Linz
Organizational unit:Institut für Halbleiter- und Festkörperphysik
Street address:Altenbergerstraße 69
Postal code:4040
City:Linz
Mail:alberta.bonanni(at)jku.at
Homepage:http://magicspin.jku.at/alberta.bonanni.php
Assignments to Research Areas:
Research area(s):
  • Solid State Physics
Assignments to Fields of Work According to the Austrian System of Science Areas:
Field(s) of work:
  • Magnetism (103017)
  • Semiconductor physics (103011)
  • Solid state physics (103009)
Data Acquisition:
Date of the data acquisition:11.06.2012
Data acquisition period:from: 2007   up to including: 2011
Research Group at the Time of the Data Acquisition:
Scientific group members:
8 Persons
Dr. Andrea Navarro-Quezada
Dr. Thibaut Devillers
Dr. Li Tian
Dr. Bogdan Faina
Dr. Rajdeep Adhikari
Dipl. Ing. Andreas Grois
Dipl.-Ing. Martin Huber
David Auinger
Percentage project-funded:100
Scientific Output in the Above Data Acquisition Period:
H-index of the group head:16
Number of publications:32
Five most important publications:
  1. A. Bonanni, M. Kiecana, C. Simbrunner, Tian Li, M. Sawicki, M. Wegscheider, et al., `Paramagnetic GaN:Fe and ferromagnetic (Ga,Fe)N: The relation between structural, electronic and magnetic properties´, Phys. Rev. B 75, 125210 (2007)
  2. W. Pacuski, P. Kossacki, D. Ferrand, A. Golnik, J. Cibert, M. Wegscheider, A. Navarro-Quezada, A. Bonanni, `Influence of strong coupling between holes and localized spins on exchange splitting of excitons in (Ga,Fe)N´, Phys. Rev. Lett. 100, 037204 (2008).
  3. A. Bonanni, A. Navarro-Quezada, Tian Li, M. Wegscheider, et al., `Controlled aggregation of magnetic ions in a semiconductor. Experimental demonstration´ Phys. Rev. Lett. 101, 135502 (2008).
  4. A. Bonanni and T. Dietl, `A story of high-temperature ferromagnetism in semiconductors´, Chem. Soc. Rev. 39, 528 (2010) - Invited Review
  5. A. Navarro-Quezada, W. Stefanowicz, T. Li, B. Faina, M. Rovezzi, R. T. Lechner, T. Devillers, F. d´Acapito, G. Bauer, M. Sawicki, T. Dietl, and A. Bonanni, `Embedded magnetic phases in (Ga,Fe)N: the key role of growth temperature´ Phys. Rev. B 81, 205206 (2010)
Patents:
  • Verfahren zum Einbetten magnetischer Nanokristalle in einen Halbleiter - application number A 50207/2012, filing date 29.05.2012
Awards:
  • A.Bonanni - 2012: OÖ Forscherinnen 2012 - Prize for International Visibility
  • A. Grois: Macke Prize 2011
Five most important talks:
  1. A. Bonanni: Invited Talk, March Meeting of the American Physical Society (APS March Meeting), Dallas (Texas, USA) (2011)
  2. A. Bonanni: Invited Talk, 6th International Conference on Physics and Applications of Spin Related Phenomena in Semiconductors (PASPS6), Tokyo (Japan) (2010)
  3. A. Bonanni: Invited Talk, 55th Conference on Magnetism and magnetic Materials, Atlanta (Georgia, USA) (2010)
  4. A. Bonanni: Invited Talk, March Meeting of the American Physical Society (APS March Meeting), Pittsburgh (Pennsylvania, USA) (2009)
  5. A. Bonanni: Invited Talk, 29th international Conference on the Physics of Semiconductors (ICPS29), Rio de Janeiro (Brazil) (2008)
Projects and Funding Granted in the Above Data Acquisition Period:
Competitive projects:
  • FWF:
    Magnetic nitrides probed via microwave resonances [P24471]
    Duration: 01.01.2013-31.12.2014
    Budget: 424.758 Euro
  • FWF:
    Determination of ferromagnetic phase diagram in nitrides [P22477]
    Laufzeit: 2010 - 2012; Mittel: 385 kEuro
  • FWF
    Controlling the formation of magnetic nanocrystals in diluted magnetic semiconductors [P20065]
    Duration: 01.01.2008-31.12.2010
    Budget: 324.000 Euro
  • FWF-FFG:
    Nanoinitiative Austria: NSI - Nanoprobe
    Laufzeit: 2009 - 2011; Mittel: 90 kEuro
  • EC:
    M. Curie Initial Training network in Nanoscale Semiconductor Spintronics - SemiSpinNet
    Laufzeit: 2010 - 2012
Funded awards:
  • ERC:
    ERC Advanced Grant [P 227690] FunDMS - Functionalisation of diluted magnetic semiconductors
    Laufzeit: 2010 - 2015
Other projects:
  • ÖAD-Projekt - Wissenschaftlich - Technische Zusammenarbeit:
    Optische und magnetische Eigenschaften von Eisen dotiertem GaN (Polen-Österreich) [Projekt 01/2006]
    Laufzeit: 2006 - 2007
  • ÖAD-Projekt - Wissenschaftlich - Technische Zusammenarbeit:
    Eingebettete Metallische Nanokristalle in Halbleiter mit großer Bandlücke für neuartige
    Spintronik und Magnetooptische Bauelemente (Polen-Österreich) [Projekt 10/2010]
    Laufzeit: 2006 - 2007
  • Kondensiert und verdünnt magnstische Nitride: Bestimmung der fundamentalen Austauschwechselworkungen und des Weges zu spintroniscen Funktionalitäten [PL05/2012]
    Wissenschaftlich-Technische Zusammenarbeit Poland-Austria
    http://www.oead.at/
    Exchange project with the Institute of Physics, Polish Academy of Sciences, Warsaw
    Duration: 01.04.2012-31.03.2014
  • Synchrotron-Projekt [ESRF Grenoble, France] Project SI 1446:
    September 13 to 19, 2006: "X-ray standing wave investigation of ferromagnetic GaFeN layers" at ID32.
  • Synchrotron-Projekt [ESRF Grenoble, France] Project SI 1467:
    April 25 to 30, 2007: "Spinodal decomposition of GaFeN investigated by anomalous x-ray scattering" at ID01
  • Synchrotron-Projekt [ESRF Grenoble, France] Project SI 1633:
    November 28 to December 4, 2007:"Fe-rich phases in ferromagnetic GaFeN epitaxial layers" at ID31
  • Synchrotron-Projekt [ESRF Grenoble, France] Project SI 1799:
    February 27 to March 3, 2009: "Influence of codoping on nanocrystal formation in GaFeN" at BM20
  • Synchrotron-Projekt [ESRF Grenoble, France] Project SI 1981:
    September 23 to 29, 2009: "In-situ x-ray diffraction investigation of growth of ferromagnetic clusters in (Ga,Mn)N epitaxial layers"
  • Synchrotron-Projekt [ESRF Grenoble, France] Project HS4035:
    June 10 to 15, 2010: "Mn Local structure in GaN: a systematic investigation from dilution to clusterization"
  • Synchrotron-Projekt [ESRF Grenoble, France] Project 08-01-894:
    November 3 to 9, 2010: "Local order around Mn magnetic dopants in GaN-pAlGaN multilayers"
  • Synchrotron-Projekt [ESRF Grenoble, France] Project HS4246:
    December 8 to 14, 2010: "Investigation of Fe-rich phases in (Ga,Fe)N:Mg by x-ray diffraction" at BM20
  • Synchrotron-Projekt [MaxLab Lund, Sweden] Project I311:
    June 2009: "XMCD analysis of the magnetic properties of (Ga,Fe)N, GaFe:N and (Ga,Fe)N:(Si,Mg)" at D1011.
  • Synchrotron-Projekt [MaxLab Lund, Sweden] Project I311:
    February 2010: "XMCD of (Ga,Fe)N" at D1011.
  • High Magnetic Fields Projekte [National High Magnetic Field Laboratory Florida State University, Florida, USA] P01536-E001:
    October 2010: "Magnetic resonances of Mn3+ in (Ga,Mn)N" at EMR
  • Synchrotron-Projekt [BESSY, Berlin]
    Project: 2012-2-120261
    Deccember 2012
    Complex dielectric function and effects of p-d hybridization in (Ga,Fe)N and (Ga,Mn)N in correlation with the charge state of the transition metal ions
Research Topics:
Current research topics:
  • Dilute and phase separated magnetic semiconductors
  • Magnetic nanocrystals
  • Nitrides for spintronics
  • Spintronic functionalities
  • Magnetic interactions in semiconductors
  • Epitaxial growth
Future topics (next 5 years):
  • Magnetic semiconductors
  • Magnetic interactions in semiconductors
  • Synchrotron radiation absorption and diffraction
  • Advanced electron microscopy
  • 2D structures
  • Topological insulators
Teaching and Research Mobility in the Above Data Acquisition Period:
Habilitations:
1 habilitation
  1. Alberta Bonanni
    29.05.2008
    "Acceptors and magnetic ions in wide gap semiconductors - homogeneous doping vs. superstructures formation"
Doctor's theses:
7 doctor's theses
  1. Andrea Navarro-Quezada - Growth and synchrotron radiation XRD of TM-doped GaN
  2. Matthias Wegscheider - Magnetooptics of Fe-doped GaN
  3. Clemens Simbrunner - Epitaxy of novel TM-doped GaN
  4. Bogdan Faina - Effect of strong p-d coupling on the Curie temperature of TM-doped p-type GaN
  5. Andreas Grois - XPS of TM-doped nitrides
  6. Zeinab Amin-Akhlaghi - Ab initio simulations of transition metal doped graphene nanoribbons
  7. Martin Huber - High efficiency GaN FETs
Diploma and master theses:
6 theses
  1. Martin Quast, Uni Linz - Magnetotransport in TM-doped GaN
  2. Andreas Grois, Uni Linz -Optical studies of manganese doped gallium nitride
  3. Matthias Wegscheider, Uni Linz - Optical characterisation of N-based DMS
  4. T. Winkler, Uni Linz - Novel Mn-doped phosphides and nitrides
  5. A. Grois, Uni Linz - Magnetooptics of Mn-doped nitrides
  6. D. Auinger - GaN-based FETs on Si
Bachelor theses:
4 theses
  1. W. Schlögelhofer - PL of (Ga,Fe)N
  2. D. Auinger - Annealing of (Ga,Fe)N
  3. H. Watzinger - PL of delta-(Ga,Fe)N
  4. M. Reindl - Transport in (Ga,TM)N
International networking:
  • T. Dietl (incoming), Polish Academy of sciences - ÖAD exchange program Poland-Austria
  • J. Suffcinsky (incoming), Warsaw University - ÖAD exchange program Poland-Austria
  • T. Winkler (outgoing), University of Berkeley (USA) - Marshall Plan fellowship
  • A. Bonanni, A. Navarro-Quezada, B. Faina, A. Grois (outgoing), Polish Academy of sciences - ÖAD exchange program Poland-Austria
  • A. Bonanni, A. Navarro-Quezada, B. Faina, M. Rovezzi, T. Devillers, A. Grois (outgoing), European Synchrotron Radiation Facility (ESRF), Grenoble, France - various beam-times
  • A. Bonanni (outgoing) - Tohoku University (Japan)
  • D. Leite (incoming) - University of Sao Paulo (Brazil)
  • A. Bonanni (outgoing) - Center of Nanoscopy, University of Denmark, Copenhagen
  • R. Dunin-Borkowski, A.Novac (incoming) - Center of Nanoscopy, University of Denmark, Copenhagen
  • D. Hommel (incoming) - University of Bremen (Germany)
  • M: Coey (incoming) - Trinity College Dublin (Ireland)
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