• Application of a long short-term memory for deconvoluting conductance contributions at charged ferroelectric domain walls 

      Holstad, Theodor Secanell; Ræder, Trygve Magnus; Evans, Donald; Småbråten, Didrik Rene; Krohns, Stephan; Schaab, Jakob; Yan, Zewu; Bourret, Edith; Helvoort, Antonius T. J. van; Grande, Tor; Selbach, Sverre Magnus; Agar, Joshua; Meier, Dennis Gerhard (Peer reviewed; Journal article, 2020)
      Ferroelectric domain walls are promising quasi-2D structures that can be leveraged for miniaturization of electronics components and new mechanisms to control electronic signals at the nanoscale. Despite the significant ...
    • Characterization of ferroelectric domain walls by scanning electron microscopy 

      Hunnestad, Kasper; Roede, Erik Dobloug; Helvoort, Antonius T. J. van; Meier, Dennis Gerhard (Peer reviewed; Journal article, 2020)
      Ferroelectric domain walls are a completely new type of functional interface, which have the potential to revolutionize nanotechnology. In addition to the emergent phenomena at domain walls, they are spatially mobile and ...
    • Conductivity Contrast and Tunneling Charge Transport in the Vortexlike Ferroelectric Domain Patterns of Multiferroic Hexagonal YMnO3 

      Ruff, E.; Krohns, S.; Lilienblum, M.; Meier, Dennis Gerhard; Fiebig, Manfred; Lunkenheimer, Peter; Loidl, Alois (Journal article, 2017)
      We deduce the intrinsic conductivity properties of the ferroelectric domain walls around the topologically protected domain vortex cores in multiferroic YMnO3. This is achieved by performing a careful equivalent-circuit ...
    • Domain-wall engineering and topological defects in ferroelectric and ferroelastic materials 

      Nataf, Guillaume; Gregg, J Marty; Meier, Dennis Gerhard; Hlinka, Jiri; Salje, Ekhard K. H. (Journal article, 2020)
      Ferroelectric and ferroelastic domain walls are 2D topological defects with thicknesses approaching the unit cell level. When this spatial confinement is combined with observations of emergent functional properties, such ...
    • Domains and domain walls in multiferroics 

      Evans, Donald; Garcia, Vincent; Meier, Dennis Gerhard; Bibes, Manuel (Journal article, 2020)
      Multiferroics are materials combining several ferroic orders, such as ferroelectricity, ferro- (or antiferro-) magnetism, ferroelasticity and ferrotoroidicity. They are of interest both from a fundamental perspective, as ...
    • Functional electronic inversion layers at ferroelectric domain walls 

      Mundy, Julia; Schaab, Jakob; Kumagai, Yu; Cano, Andres; Stengel, Massimiliano; Krug, Ingo P.; Gottlob, Daniel G.; Doganay, Hattice; Holtz, Megan, E.; Held, Rainer; Yan, Zewu; Bourret, Edith; Schneider, Claus M.; Schlom, Darrel G.; Muller, David A.; Ramesh, Ramamoorthy; Spaldin, Nicola A.; Meier, Dennis Gerhard (Journal article; Peer reviewed, 2017)
      Ferroelectric domain walls hold great promise as functional two-dimensional materials because of their unusual electronic properties. Particularly intriguing are the so-called charged walls where a polarity mismatch causes ...
    • Insulating improper ferroelectric domain walls as robust barrier layer capacitors 

      Puntigam, Lukas; Schultheiss, Jan; Strinic, Ana; Yan, Zewu; Bourret, Edith; Altthaler, Markus; Keszmarki, Istvan; Evans, Donald; Meier, Dennis Gerhard; Krohns, Stephan (Peer reviewed; Journal article, 2021)
      We report the dielectric properties of improper ferroelectric hexagonal (h-)ErMnO3. From the bulk characterization, we observe a temperature and frequency range with two distinct relaxation-like features, leading to high ...
    • Intrinsic and extrinsic conduction contributions at nominally neutral domain walls in hexagonal manganites 

      Schultheiß, Jan; Schaab, Jakob; Småbråten, Didrik Rene; Skjærvø, Sandra Helen; Bourret, Edith; Yan, Zewu; Selbach, Sverre Magnus; Meier, Dennis Gerhard (Peer reviewed; Journal article, 2020)
      Conductive and electrostatic atomic force microscopy (cAFM and EFM) are used to investigate the electric conduction at nominally neutral domain walls in hexagonal manganites. The EFM measurements reveal a propensity of ...
    • Local control of improper ferroelectric domains in YMnO 3 

      Kuerten, Lukas; Krohns, Stephan; Schoenherr, Peggy; Holeczek, Katharina; Pomjakushina, Ekaterina; Lottermoser, Thomas; Trassin, Morgan; Meier, Dennis Gerhard; Fiebig, Manfred (Peer reviewed; Journal article, 2020)
      Improper ferroelectrics are described by two order parameters: a primary one, driving a transition to long-range distortive, magnetic, or otherwise nonelectric order, and the electric polarization, which is induced by the ...
    • Local electric-field control of multiferroic spin-spiral domains in TbMnO3 

      Schoenherr, Peggy; Manz, Sebastian; Kuerten, Lukas; Shapovalov, Konstantin; Iyama, Ayato; Kimura, Tsuyoshi; Fiebig, Manfred; Meier, Dennis Gerhard (Journal article, 2020)
      Spin-spiral multiferroics exhibit a magnetoelectric coupling effects, leading to the formation of hybrid domains with inseparably entangled ferroelectric and antiferromagnetic order parameters. Due to this strong magnetoelectric ...
    • Observation of Unconventional Dynamics of Domain Walls in Uniaxial Ferroelectric Lead Germanate 

      Bak, Ohheum; Holstad, Theodor Secanell; Lu, Haidong; Evans, Donald; Hunnestad, Kasper Aas; Wang, Bo; Becker, Petra; Bohatý, Ladislav; Helvoort, Antonius T. J. van; Gregg, J Marty; Meier, Dennis Gerhard; Gruverman, Alexei (Peer reviewed; Journal article, 2020)
      Application of scanning probe microscopy techniques such as piezoresponse force microscopy (PFM) opens the possibility to re‐visit the ferroelectrics previously studied by the macroscopic electrical testing methods and ...
    • A short history of multiferroics 

      Meier, Dennis Gerhard; Lottermoser, Thomas (Journal article, 2020)
      The realization that materials with coexisting magnetic and ferroelectric order open up efficient ways to control magnetism by electric fields unites scientists from different communities in the effort to explore the ...
    • Strain relaxation dynamics of multiferroic orthorhombic manganites 

      Carpenter, Michael A.; Pesquera, David; Palstra, Thomas T M; Meier, Dennis Gerhard (Peer reviewed; Journal article, 2020)
      Resonant Ultrasound Spectroscopy has been used to characterise strain coupling and relaxation behaviour associated with magnetic/magnetoelectric phase transitions in GdMnO3, TbMnO3 and TbMn0.98Fe0.02O3 through their influence ...
    • Visualizing Ferroelectric Domain Structures in ErMnO3 and Pb5Ge3O11 by Electron Microscopy 

      Kasper Aas Hunnestad (Master thesis, 2019)
      Ferroelektriske domenevegger har nylig tiltrukket økende oppmerksomhet som nye kandidater for funksjonelle 2D-systemer. Disse atomskarpe grensesnittene som kan flyttes, opprettes og fjernes med elektriske felt, kan brukes ...