apl. Prof. Dr. Helmut Karl

Arbeitsgruppenleiter Nanoscale Functional Oxides
Experimentalphysik IV
Telefon: +49 (0) 821 598-3432
Fax: +49 (0) 821 598-3425
E-Mail:
Raum: 475 (R)
Adresse: Universitätsstraße 1 (Physik Nord), 86159 Augsburg

Publikationen

Helmut Karl
2020 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1995 | 1994 | 1993 | 1992 | 1991 | 1990 | 1988

2020

Jimmy John, Yael Gutierrez, Zhen Zhang, Helmut Karl, Shriram Ramanathan, Régis Orobtchouk, Fernando Moreno und Sébastien Cueff
Multipolar resonances with designer tunability using VO2 phase-change materials

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Jan Mundry, Hubert J. Krenner, Helmut Karl und Markus Betz
Near-infrared saturable and reverse saturable absorption of ion beam synthesized VO2 nanocrystals

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2017

A. Hartwig, O. Klein und Helmut Karl
Sputtered titanium dioxide thin films for galvanic corrosion protection of AISI 304 stainless steel coupled with carbon fiber reinforced plastics

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2016

Birgit Hebler, Alexander Hassdenteufel, Patrick Reinhardt, Helmut Karl und Manfred Albrecht
Ferrimagnetic Tb–Fe alloy thin films: composition and thickness dependence of magnetic Properties and all-optical switching

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M. Berl, L. Tiemann, W. Dietsche, Helmut Karl und Werner Wegscheider
Structured back gates for high-mobility two-dimensional electron systems using oxygen ion implantation

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Andreas Brenneis, Felix Schade, Simon Drieschner, Florian Heimbach, Helmut Karl, Jose A. Garrido und Alexander W. Holleitner
THz-circuits driven by photo-thermoelectric, gate-tunable graphene-junctions

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Thorben Jostmeier, Hans Moritz Mangold, Johannes Zimmer, Helmut Karl, Hubert J. Krenner, Claudia Ruppert und Markus Betz
Thermochromic modulation of surface plasmon polaritons in vanadium dioxide nanocomposites

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2015

M. F. Sarmanova, Helmut Karl, Stephan Mändl, D. Hirsch, S.G. Mayr und Bernd Rauschenbach
Elastic properties of sub-stoichiometric nitrogen ion implanted silicon

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V. Baranwal, Jürgen W. Gerlach, A. Lotnyk, Bernd Rauschenbach, Helmut Karl, S. Ojha, D. K. Avasthi, D. Kanjilal und Avinash C. Pandey
Embedded Ge nanocrystals in SiO2 synthesized by ion implantation

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Alexander Hartwig, M. Decker, O. Klein und Helmut Karl
Stoichiometric titanium dioxide ion implantation in AISI 304 stainless steel for corrosion protection

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Helmut Karl und S.C. Peyinghaus
Tailoring of the thermomechanical performance of VO2 nanowire bimorph actuators by ion implantation

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N. Erhard, S. Zenger, Stefanie Morkötter, Daniel Rudolph, M. Weiss, Hubert J. Krenner, Helmut Karl, Gerhard Abstreiter, Jonathan J. Finley, Gregor Koblmüller und A. W. Holleitner
Ultrafast Photodetection in the Quantum Wells of Single AlGaAs/GaAs-Based Nanowires

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2014

Thorben Jostmeier, Johannes Zimmer, Helmut Karl, Hubert J. Krenner und Markus Betz
Optical Preparation of Stable Supercooled VO2 Nanocrystals: A Route Towards Reconfigurable Photonic Devices for TelecomWavelengths

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Thorben Jostmeier, Johannes Zimmer, Helmut Karl, Hubert J. Krenner und Markus Betz
Optically imprinted reconfigurable photonic elements in a VO2 nanocomposite

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Hans Moritz Mangold, Helmut Karl und Hubert J. Krenner
Site-Selective Ion Beam Synthesis and Optical Properties of Individual CdSe Nanocrystal Quantum Dots in a SiO2 Matrix

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Andreas Brenneis, Louis Gaudreau, Max Seifert, Helmut Karl, Martin S. Brandt, Hans Huebl, Jose A. Garrido, Frank H. L. Koppens und Alexander W. Holleitner
Ultrafast electronic readout of diamond nitrogen–vacancy centres coupled to graphene

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T. Kraus, A. Griesser, O. Klein, Martin Fischer, Matthias Schreck und Helmut Karl
Yttria-stabilized zirconia buffered silicon to optimize in-plane electrical conductivity of [Ca2CoO3]0.62[CoO2] thin films

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2013

Johannes Zimmer, Simon A. Haug, Achim Wixforth, Helmut Karl und Hubert J. Krenner
Nanothermochromic diffraction gratings with giant switching contrast based on the metal-insulator transition of vanadium dioxide

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Nadine Erhard, Paul Seifert, Leonhard Prechtel, Simon Hertenberger, Helmut Karl, Gerhard Abstreiter, Gregor Koblmüller und Alexander W. Holleitner
Ultrafast photocurrents and THz generation in single InAs-nanowires

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2012

Johannes Zimmer, Achim Wixforth, Helmut Karl und Hubert J. Krenner
Ion beam synthesis of nanothermochromic diffraction gratings with giant switching contrast at telecom wavelengths

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Erratum: https://doi.org/10.1063/1.4766169

Leonhard Prechtel, Milan Padilla, Nadine Erhard, Helmut Karl, Gerhard Abstreiter, Anna Fontcuberta I Morral und Alexander W. Holleitner
Time-resolved photoinduced thermoelectric and transport currents in GaAs nanowires

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2011

Thomas Wehlus, Timo H. Körner, Stefan Nowy, Jörg Frischeisen, Helmut Karl, Bernd Stritzker und Wolfgang Brütting
Hybrid organic-inorganic materials for integrated optoelectronic devices

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2010

Helmut Karl, Jing Peng und Bernd Stritzker
Effects of He-irradiation on the metal-to-insulator transition of vanadium dioxide nanoclusters

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2009

D. J. As, E. Tschumak, H. Pöttgen, O. Kasdorf, Jürgen W. Gerlach, Helmut Karl und K. Lischka
Carbon doping of non-polar cubic GaN by CBr4

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Helmut Karl, J. Dreher und Bernd Stritzker
Semiconductor-metal phase transition in doped ion beam synthesized VO2 nanoclusters

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2008

A. W. Achtstein, Helmut Karl, S. Zhenhua und Bernd Stritzker
Memory effects in optically active CdSe nanocrystal doped MOS structures

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Rosiana Aguiar, Dmitry Logvinovich, Anke Weidenkaff, Helmut Karl, Christof W. Schneider, Armin Reller und Stefan G. Ebbinghaus
Physical properties of (La,Sr)Ti(O,N)3 thin films grown by pulsed laser deposition

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V. Baranwal, Avinash C. Pandey, Jürgen W. Gerlach, Bernd Rauschenbach, Helmut Karl, D. Kanjilal und D. K. Avasthi
Rapid thermal and swift heavy ion induced annealing of Co ion implanted GaN films

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2007

Helmut Karl
Combinatorial ion beam synthesis of II-VI compound semiconductor nanoclusters

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2006

P. Huber, Helmut Karl und Bernd Stritzker
Combinatorial ion beam synthesis of CdSxSe1-x nanocrystals

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A. W. Achtstein, Helmut Karl und Bernd Stritzker
Electric-field-controlled photoluminescence of CdSe nanocrystal-doped SiO2 on Si

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A. W. Achtstein, Helmut Karl und Bernd Stritzker
Field induced photoluminescence quenching and enhancement of CdSe nanocrystals embedded in SiO2

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Helmut Karl, Ch. Delpero, P. Huber und Bernd Stritzker
Recovery of the Si-SiO2 interface studied by self-diffusion after high fluence ion implantation of Si-28

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Helmut Karl, Ch. Delpero, P. Huber und Bernd Stritzker
Recovery of the Si–SiO2 interface studied by self-diffusion after high fluence ion implantation of 28Si

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S. Groudeva-Zotova, Helmut Karl, A. Savan, J. Feydt, B. Wehner, T. Walther, N. Zotov, Bernd Stritzker und A. Ludwig
Structural and magnetic characteristics of FeCo thin films modified by combinatorial ion implantation

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P. Huber, Helmut Karl, Jörg K. Lindner und Bernd Stritzker
Structural investigation of CdSSe-nanocrystals synthesized by ion-beam-implantation

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P. Huber, Helmut Karl und Bernd Stritzker
Synthesis and laser annealing of embedded CdSe-nanoparticles in SiO2 by pulsed excimer laser radiation

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2005

Helmut Karl, Ingo Großhans und Bernd Stritzker
Combinatorial ion beam synthesis of semiconductor nanoclusters

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I. D. Desnica-Frankovic, P. Dubček, M. Buljan, K. Furic, U. V. Desnica, S. Bernstorff, Helmut Karl, Ingo Großhans und Bernd Stritzker
Influence of stoichiometry deviations on properties of ion-beam synthesized CdSe QDs

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Stefan Gsell, Matthias Schreck, Thomas Bauer, Helmut Karl, Götz Thorwarth, A. Bergmaier, G. Dollinger und Bernd Stritzker
The nucleation centers formed during bias-enhanced nucleation of diamond on iridium: structure and stability

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2004

Ingo Großhans, Helmut Karl und Bernd Stritzker
Combinatorial ion implantation – a smart technique applied to synthesize CdSe-nanocrystals

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Helmut Karl, Ingo Großhans und Bernd Stritzker
Self organized compound semiconductor nanocrystallite distributions in SiO2 on Silicon synthesized by ion implantation

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Helmut Karl, I. Groβhans, P. Huber und Bernd Stritzker
Superfluorescence of ion beam synthesized dense-packed embedded CdSe nanoclusters

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Ingo Großhans, Helmut Karl und Bernd Stritzker
Synthesis and screening of materials libraries of buried compound semiconductors by ion beam implantation

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Ingo Großhans, Helmut Karl und Bernd Stritzker
Temporal evolution of ion implanted CdSe distribution in SiO2 on Silicon during annealing

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2003

Ingo Großhans, Helmut Karl und Bernd Stritzker
Advanced apparatus for combinatorial synthesis of buried II-VI nanocrystals by ion implantation

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Ingo Großhans, Helmut Karl und Bernd Stritzker
Automated implanter endstation for combinatorial materials science with ion beams

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I. D. Desnica-Frankovic, U. V. Desnica, P. Dubček, M. Buljan, S. Bernstorff, Helmut Karl, Großhans und Bernd Stritzker
Ion beam synthesis of buried Zn-VI quantum dots in SiO2 – grazing incidence small-angle X-ray scattering studies

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W. Hipp, Helmut Karl, Ingo Großhans und Bernd Stritzker
Quantum confinement in CdSe-nanocrystallites synthesized by ion implantation

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Andreas Heinrich, Bernhard Wörz, Helmut Karl und Bernd Stritzker
Study of a non-thermal/thermal formation of NiO on Ni5W-tapes

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2002

Ingo Großhans, Helmut Karl und Bernd Stritzker
Combinatorial synthesis of ZnTe nanocrystals in SiO2 on Silicon by ion implantation

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Helmut Karl, K. Y. Gao, Ingo Großhans, W. Hipp und Bernd Stritzker
Comparative study of as-implanted and pre-damaged ion-beam-synthesized ZnS nanocrystallites in SiO2

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Helmut Karl, W. Hipp, Ingo Großhans und Bernd Stritzker
Ion beam synthesis of buried CdSe nanocrystallites in SiO2 on (100)-Silicon

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Helmut Karl, Ingo Großhans, Axel Wenzel, Bernd Stritzker, Ralph Claessen, Vladimir Strocov, G. E. Cirlin, V. A. Egorov, N. K. Polyakov, Yu. B. Samsonenko, D. V. Denisov, V. M. Ustinov und Zh. I. Alferov
Stoichiometry and absolute atomic concentration profiles obtained by combined Rutherford backscattering spectroscopy and secondary-ion mass spectroscopy: InAs nanocrystals in Si

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2001

Helmut Karl, Ingo Großhans, Wilfried Attenberger, Markus Schmid und Bernd Stritzker
Buried ZnTe nanocrystallites in thermal SiO2 on silicon synthesized by high dose ion implantation

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2000

Axel Wenzel, Helmut Karl und Bernd Rauschenbach
Distribution of ion implanted dopants in Gallium Nitride

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1995

B. Avenhaus, A. Porch, M. J. Lancaster, S. Hensen, M. Lenkens, S. Orbach-Werbig, G. Müller, U. Dähne, N. Tellmann, N. Klein, C. Dubourdieu, J. P. Senateur, O. Thomas, Helmut Karl, Bernd Stritzker, J. A. Edwards und R. Humphreys
Microwave properties of YBCO thin films

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1994

Ludwig Hofmann, Helmut Karl, Philipp Seng und Konrad Samwer
Hall effect measurements on YBa2Cu3O7-d-films with different oxygen deficiency

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L. Hofmann, Philipp Seng, Helmut Karl und Konrad Samwer
Hall effect measurements on YBa2Cu3O7−δ-films with different oxygen defficiency

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G. Dortmann, J. Erxmeyer, S. Blässer, J. Steiger, T. Paatsch, Andreas Weidinger, Helmut Karl und Bernd Stritzker
Hydrogenation of thin Y-Ba-Cu-O films: electrical transport and structure properties of YBa2Cu3O7 and YBa2Cu4O8

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Helmut Karl, Josef Hartmann und Bernd Stritzker
In-plane lattice constant relaxation during laser ablation of YBCO and yttria-stabilized zirconia

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Ludwig Hofmann, Helmut Karl und Konrad Samwer
Normal-state hall effect and resistivity measurement of YBa2Cu3Ox-films with different oxygen content

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L. Hofmann, Helmut Karl und Konrad Samwer
Normal-state hall effect and resistivity measurements of YBa2Cu3Ox-films with different oxygen content

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A. Neminsky, J. Dumas, B. P. Thrane, C. Schlenker, Helmut Karl und Bernd Stritzker
Thickness dependence of the irreversibility line in YBa2Cu3O7 epitaxial thin films

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A. Neminsky, J. Dumas, C. Schlenker, Helmut Karl und Bernd Stritzker
Time dependent effects in the irreversibility line of YBa2Cu3O7 very thin films studied by DC magnetization

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Helmut Karl
Zeitaufgelöste in-situ-RHEED-Messungen während der Laserablation von YBa 2 Cu 3 O 7-x , SrTiO 3 und (Y 2 O 3 ) ZrO 2 und Charakterisierung der Schichten mit dem Raster-Tunnel-Mikroskop, RBS und elektrischen Methoden

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Urspr. erschienen als Augsburg, Univ., Diss., 1994.

Helmut Karl
Zeitaufgelöste in-situ-RHEED-Messungen während der Laserablation von YBa2Cu3O7-x, SrTiO3 und (Y2O3)ZrO2 und Charakterisierung der Schichten mit dem Raster-Tunnel-Mikroskop, RBS und elektrischen Methoden

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Augsburg, Univ., Diss., 1994

1993

Helmut Karl und Bernd Stritzker
In-situ rheed studies of YBCO-film growth during pulsed laser deposition

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Helmut Karl und Bernd Stritzker
Rheed-oscillations during pulsed laser deposition of YBCO

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A. Neminsky, B. P. Thrane, J. Dumas, R. Buder, C. Schlenker, Helmut Karl, Thomas Bollmeier, Bernd Stritzker und M. Brunel
Thickness dependence of the irreversibility line in YBa2Cu3O7 thin films studied by magnetic and microwave measurements

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1992

Helmut Karl und Bernd Stritzker
Reflection high-energy electron diffraction oscillations modulated by laser-pulse deposited YBa2Cu3O7-x

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1991

C. Ziegler, F. Baudenbacher, Helmut Karl, H. Kinder und W. Göpel
Interface analysis of the system Si/YBa2Cu3O7-x

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1990

F. Baudenbacher, Helmut Karl, P. Berberich und H. Kinder
In-situ Rheed studies of initial growth stages of YBCO-films by thermal Co-evaporation

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A. Lega, Helmut Karl, W. Dietsche, A. Fischer und K. Ploog
Phonon-drag effect in GaAs-AlGaAs heterostructures by monochromatic phonons

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F. Baudenbacher, Helmut Karl, P. Berberich und H. Kinder
Rheed studies of epitaxial growth of YBCO-films prepared by thermal co-evaporation

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1988

Helmut Karl, W. Dietsche, A. Fischer und K. Ploog
Imaging of the phonon-drag effect in GaAs-AlGaAs heterostructures

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