Background and activities

Our research studies the emergence of novel states of matter, arising from the intricate coupling of spin, charge, and orbital degrees of freedom in low symmetry systems with strongly correlated electrons. Of special interest are functional nano-objects, such as ferroic domain walls and magnetic skyrmions. For investigating their fundamental physics we are applying different imaging techniques including

  • Tunneling electron microscopy
  • Cathode-lens microscopy
  • Scanning probe microscopy

This unique combination of complementary microscopy methods allows for continuously covering all length scales from the sub-nanometer regime up to mesoscopic distances in spatially resolved measurements.

Further information about our research can be found here: Functional topological systems @ FACET

 

Highlights

  • Topological domain walls in helimagnets: Helimagnets develop new types of domain walls which are completely different from the walls we know from ferromagnets and antiferromagnets. Schoenherr, P., et al., Nature Physics 14, 465 (2018)
  • Dennis Meier receives Gustav-Hertz Award 2017 (DPG) honoring his contributions to the research on domain walls in multiferroics.

  • Functional electronic inversion layers at ferroelectric domain walls: Domain walls offer the possibility to emulate the behavior of electronic components, such as switches, transistors and gates, at the atomic scale. Mundy, J., et al., Nature Materials 16, 622 (2017)

 

News Shorts about our work

 

Publications

2018

  • Electrical half-wave rectification at ferroelectric domain walls, J. Schaab, S. H. Skjærvø, S. Krohns, X. Dai, M. Holtz, A. Cano, M. Lilienblum, Z. Yan, E. Bourret, D. A. Muller, M. Fiebig, S. M. Selbach, and D. Meier, Nature Nano. DOI:10.1038/s41565-018-0253-5 (2018)
  • Topological domain walls in helimagnets, P. Schoenherr, J. Müller, L. Köhler, A. Rosch, N. Kanazawa, Y. Tokura, M. Garst, and D. Meier, Nature Physics 14, 465 (2018)
  • Magnetoelectric inversion of domain patterns, N. Leo, V. Carolus, J. S. White, M. Kenzelmann, M. Hudl, P. Tolédano, T. Honda, T. Kimura, S. A. Ivanov, M. Weil, Th. Lottermoser, D. Meier, and M. Fiebig, Nature 560, 466 (2018)
  • Electronic bulk and domain wall properties in B-site doped hexagonal ErMnO3, T. S. Holstad, D. M. Evans, A. Ruff, D. R. Småbråten, J. Schaab, Ch. Tzschaschel, Z. Yan, E. Bourret, S. M.Selbach, S. Krohns, and D. Meier, Phys. Rev. B 97, 085143 (2018)
  • Charged domain walls in improper ferroelectric hexagonal manganites and gallates, D. R. Småbråten, Q. N. Meier, S. H. Skjærvø, K. Inzani, D. Meier, and S. M. Selbach, arXiv:1806.06202 (2018)
  • Frequency dependent polarization switching in h-ErMnO3, A. Ruff, Z. Li, A. Loidl, J. Schaab, M. Fiebig, A. Cano, Z. Yan, E. Bourret, J. Glaum, D. Meier, and S. Krohns, Appl. Phys. Lett. 112, 182908 (2018)

2017

  • Functional electronic inversion layers at ferroelectric domain walls, J. Mundy, J. Schaab, Y. Kumagai, A. Cano, M. Stengel, I. P. Krug, D. M. Gottlob, H. Doganay, M. E. Holtz, R. Held, Z. Yan, E. Bourret, C. M. Schneider, D. G. Schlom, D. A. Muller, R. Ramesh, N. A. Spaldin, and D. Meier, Nature Materials 16, 622 (2017)
  • Topological defects in hexagonal manganites - Inner structure and emergent electrostatics, M. E. Holtz, K. Shapovalov, J. A. Mundy, C. S. Chang, Z. Yan, E. Bourret, D. A. Muller, D. Meier, and A. Cano, Nano Letters 10.1021/acs.nanolett.7b01288 (2017)
  • Conductivity contrast and tunneling charge transport in the vortex-like ferroelectric domain pattern of multiferroic hexagonal YMnO3, E. Ruff, S. Krohns, M. Lilienblum, D. Meier, M. Fiebig, P. Lunkenheimer, and A. Loidl, Phys. Rev. Lett. 118, 036803 (2017)
  • Global formation of topological defects in the multiferroic hexagonal manganites. Q. N. Meier, M. Lilienblum, S. M. Griffin, K. Conder, E. Pomjakushina, Z. Yan, E. Bourret, D. Meier, F. Lichtenberg, E. K. H. Salje, N. A Spaldin, M. Fiebig, and A. Cano, Phys. Rev. X 7, 041014 (2017)
  • Walls with special functionality, D. Meier (invited review, article in German), Physik Journal 9, 55 (2017)
  • Measuring ferroelectric order parameters at domain walls and vortices in hexagonal manganites with atomic resolution STEM, M. E. Holtz, K. Shapovalov, J. A. Mundy, C. S. Chang, D. Meier, A. Cano, and D. A. Muller, Microscopy and Microanalysis 23, 1636 (2017)
  • Magnetoelectric force microscopy on antiferromagnetic 180 degree domains in Cr2O3, P. Schoenherr, L. M. Giraldo, M. Lilienblum, M. Trassin, D. Meier, and M. Fiebig, Materials 10, 1051 (2017)

2016

  • Local dynamics of topological magnetic defects in the itinerant helimagnet FeGe, A. Dussaux, P. Schoenherr, K. Koumpouras, J. Chico, K. Chang, L. Lorenzelli, N. Kanazawa, Y. Tokura, M. Garst, A. Bergman, C. L. Degen, and D. Meier, Nature Commun. 7, 12430, (2016)
  • Reversible optical switching of antiferromagnetism in TbMnO3, S. Manz, M. Matsubara, Th. Lottermoser, J. Büchi, A. Iyama, T. Kimura, D. Meier, and M. Fiebig, Nature Photonics 10, 653 (2016)
  • The evolution of multiferroics, M. Fiebig, Th. Lottermoser, D. Meier, and M. Trassin, Nature Reviews Materials, 1, 16046 (2016)
  • Optimization of electronic domain-wall properties by aliovalent cation substitution, J. Schaab, A. Cano, M. Lilienblum, Z. Yan, E. Bourret, R. Ramesh, M. Fiebig, and D. Meier, Adv. Electron. Mater. 2, 1500195 (2016)
  • Robustness of magnetic and electric domains against charge carrier doping in multiferroic hexagonal ErMnO3, E. Hassanpour, V. Wegmayr, J. Schaab, Z. Yan, E. Bourret-Courchesne, Th. Lottermoser, M. Fiebig, and D. Meier, New. J. Phys. 18, 43015 (2016)
  • Imaging local polarization and domain boundaries with picometer-precision scanning transmission electron microscopy, M. E. Holtz, J. A. Mundy, C. S. Chang, J. A. Moyer, C. M. Brooks, H. Das, A. F. Rebola, R. Hovden, E. Padgett, C. J. Fennie, P. Schiffer, D. Meier, D. G. Schlom, and D. A Muller, Microscopy and Microanalysis 22, 898 (2016)
  • Contact-free mapping of electronic transport phenomena of polar domains in SrMnO3 thin films, J. Schaab, I. P. Krug, H. Doganay, J. Hackl, D. M. Gottlob, M. I. Khan, S. Nemsak, L. Maurel, E. Langenberg, P. A. Algarabel, J. A. Pardo, C. M. Schneider, and D. Meier, Phys. Rev. Appl. 5, 054009 (2016)

2015

  • Functional domain walls in multiferroics (invited topical review), D. Meier, J. Phys.: Condens. Matter 27, 463003 (2015)
  • Magnetically activated phase matching in MnWO4, N. Leo, D. Meier, P. Becker, L- Bohatý, and M. Fiebig, Optics Expr. 23, 27700 (2015)
  • Magnetoelectric domain control in multiferroic TbMnO3, M. Matsubara, S. Manz, M. Mochizuki, T. Kubacka, A. Iyama, N. Aliouane, T. Kimura, S. L. Johnson, D. Meier, and M. Fiebig, Science 348, 1112 (2015)
  • Strain-induced coupling of electrical polarization and structural defects in SrMnO3 films, C. Becher, L. Maurel, U. Aschauer, M. Lilienblum, C. Magén, D. Meier, E. Langenberg, M. Trassin, J. Blasco, I. P. Krug, P. A. Algarabel, N. A. Spaldin, J. A. Pardo, and M. Fiebig, Nature Nano. 10, 661 (2015)
  • Polarization control at spin-driven ferroelectric domain walls, N. Leo, A. Bergman, A. Cano, N. Poudel, B. Lorenz, M. Fiebig, and D. Meier, Nature Commun. 6, 6661 (2015)
  • Ferroelectric domains in the multiferroic phase of ErMnO3 imaged by low-temperature photoemission electron microscopy, J. Schaab, M. Trassin, A. Scholl, A. Doran, Z. Yan, E. Bourret, R. Ramesh, and D. Meier, J. Phys.: Conf. Ser. 592, 012120 (2015)
  • Growth of High-quality hexagonal ErMnO3 single-crystals by the pressurized floating-zone method, Z. Yan, D. Meier, J. Schaab, R. Ramesh, E. Samulon, and E. Bourret, J. Cryst. Growth 409, 75 (2015)

2014

  • Functional Ferroic Heterostructures with Tunable Integral Symmetry, C. Becher, M. Trassin, M. Lilienblum, C. T. Nelson, S. J. Suresha, D. Yi, P. Yu, R. Ramesh, M. Fiebig, and D. Meier, Nature Commun. 5, 4295 (2014)
  • Imaging and characterization of conducting ferroelectric domain walls by photoemission electron microscopy, J. Schaab, I. P. Krug, F. Nickel, D. M. Gottlob, H. Doğanay, A. Cano, M. Hentschel, Z. Yan, E. Bourret, C. M. Schneider, R. Ramesh, and D. Meier, Appl. Phys. Lett. 104, 232904 (2014)
  • Ferroic nature of magnetic toroidal order, A. S. Zimmermann, D. Meier, M. Fiebig, Nature Commun. 5, 4796 (2014)
  • Structural invariance upon antiferromagnetic ordering in geometrically frustrated Swedenborgite CaBaCo2Fe2O7, J. D. Reim, E. Roseacuten, W. Schweika, M. Meven, N. R. Leo, D. Meier, M. Fiebig, M. Schmidt, C.-Y. Kuo, T.-W. Pi, Z. Hu and M. Valldor, J. Appl. Cryst. 47, 2038 (2014)

before 2014

  • Translation domains in multiferroics, D. Meier, M. Lilienblum, P. Becker, L. Bohatý, N. A. Spaldin, R. Ramesh, and M. Fiebig,  Phase Transit. 86, 33 (2013)
  • Observation of coherent helimagnons and Gilbert damping in an itinerant helimagnet, J. Koralek and D. Meier (joint first authorship), J. P. Hinton, A. Bauer, S. A. Parameswaran, A. Vishwanath, R. Ramesh, R. W. Schoenlein, Ch. Pfleiderer, and J. Orenstein, Phys. Rev. Lett. 109, 247204 (2012)
  • Mutual induction of magnetic 3d and 4f order in multiferroic hexagonal ErMnO3,D. Meier, H. Ryll, K. Kiefer, J.-U. Hoffmann, R. Ramesh, and M. Fiebig, Phys. Rev. B 86, 184415 (2012)
  • Anisotropic conductance at improper ferroelectric domain walls, D. Meier, J. Seidel, A. Cano, K. Delaney, Y. Kumagai, M. Mostovoy, N. A. Spaldin, R. Ramesh, and M. Fiebig, Nature Mater. 11, 284 (2012)
  • Independent ferroelectric contributions and rare-earth induced polarization reversal in multiferroic TbMn2O5, N. Leo, D. Meier, R. V. Pisarev, N. Lee, S.-W. Cheong, and M. Fiebig, Phys. Rev. B 85, 094408 (2012)
  • Dimerization and charge order in Hollandite K2V8O16, A. C. Komarek, M. Isobe, J. Hemberger, D. Meier, T. Lorenz, D. Trots, A. Cervellino, M. T. Fernández-Diáz, Y. Ueda, and M. Braden, Phys. Rev. Lett. 107, 027201 (2011)
  • Theory of high-temperature multiferroicity in cupric oxide, P. Tolédano, N. Leo, D. D. Khalyavin, L. C. Chapon, T. Hoffmann, D. Meier, and M. Fiebig, Phys. Rev. Lett. 106, 257601 (2011)
  • Second harmonic generation on incommensurate structures: The case of MnWO4, D. Meier, N. Leo, G. Yuan, Th. Lottermoser, P. Becker, L. Bohatý, and M. Fiebig, Phys. Rev. B 82, 155112 (2010)
  • Incompatible magnetic order in multiferroic hexagonal DyMnO3, C. Wehrenfennig, D. Meier, Th. Lottermoser, Th. Lonkai, J.-U. Hoffmann, N. Aliuoane, D. N. Argyriou, and M. Fiebig, Phys. Rev. B 82, 100414R (2010)
  • Imaging of hybrid-multiferroic and translation domains in a spin-spiral ferroelectric, D. Meier, N. Leo, Th. Lottermoser, P. Becker, L. Bohatý, and M. Fiebig, Proceedings of the MRS Fall Meeting 2009, 1199E-F02-07 (2010)
  • Topology and manipulation of multiferroic domains in MnWO4, D. Meier, N. Leo, M. Maringer, Th. Lottermoser, P. Becker, L. Bohatý, and M. Fiebig, Phys. Rev. B 80, 224420 (2009)
  • Giant coupling of second-harmonic generation to a multiferroic polarization, Th. Lottermoser, D. Meier, R. V. Pisarev, and M. Fiebig, Phys. Rev. B 80, 100101(R) (2009)
  • Nanodomains in multiferroic hexagonal RMnO3 films (R = Y, Dy, Ho, Er), T. Kordel, C. Wehrenfennig, D. Meier, Th. Lottermoser, and M. Fiebig, I. Gélard, C. Dubourdieu, J.-W. Kim, L. Schultz, and K. Dörr, Phys. Rev. B 80, 045409 (2009)
  • Observation and coupling of domains in a spin-spiral multiferroic, D. Meier, M. Maringer, Th. Lottermoser, P. Becker, L. Bohatý, and M. Fiebig, Phys. Rev. Lett. 102, 107202 (2009)
  • Anomalous thermal expansion and strong damping of the thermal conductivity of NdMnO3 and TbMnO3 due to 4f crystal-field excitations, K. Berggold, J. Baier, D. Meier, J. A. Mydosh, T. Lorenz, J. Hemberger, A. Balbashov, N. Aliouane, and D. N. Argyriou, Phys. Rev. B 76, 094418 (2007)
  • New features in the phase diagram of TbMnO3, D. Meier, N. Aliouane, D. N. Argyriou, J. A. Mydosh, and T. Lorenz, New J. Phys. 9, 100, (2007)
  • Uniaxial pressure dependencies of the phase transitions in GdMnO3, J. Baier, D. Meier, K. Berggold, J. Hemberger, A. Balbashov, J. A. Mydosh, and T. Lorenz, J. Magn. Magn. Mat. 310, 1165 (2007)
  • Hysteresis effects in the phase diagram of multiferroic GdMnO3, J. Baier, D. Meier, K. Berggold, J. Hemberger, A. Balbashov, J. A. Mydosh, and T. Lorenz, Phys. Rev. B 73, 100402(R) (2006)
  • Nature of low temperature phase transitions in CaMn7O12, O. Volkova, Y. Arango, N. Tristan, V. Kataev, E. Gudilin, D. Meier, T. Lorenz, B. Büchner, and A. Vasiliev, JETP Lett. 82, 444 (2005)

 

Invited Talks

  • 14th International Symposium on Ferroic Domains (ISFD-2018), Barcelona, Sept 26 – 29, 2018: Advanced functional properties at improper ferroelectric domain walls
  • 1238 Conference - Control and Dynamics of Quantum Materials, Spin-orbit Coupling, Correlations, and Topology, Bensberg, Sept 10 – 12, 2018: Domain walls as functional topological nano-elements
  • QuSpin-Porelab Workshop, Trondheim, June 19, 2018: Functional topological defects in helimagnets
  • ISAF-FMA-AMF-AMEC-PFM Joint Conference (IFAAP2018), Hiroshima, May 27 – June 1, 2018: Novel concepts for all-domain-wall nanoelectronics
  • Edgar-Lüscher Seminar, Klosters, Feb 3 – 9, 2018: Towards all-domain-wall nanoelectronics
  • Physics Colloquia, NTNU, Trondheim, Jan 26, 2018: Functional domain walls in multiferroic oxides
  • Domain wall Symposium, Glaslough, Jan 3 – 5, 2018: Functional improper ferroelectric domain walls 
  • CECAM-ISR Workshop, Tel Aviv, Nov 13 – 15, 2017: Advanced domain wall functionality and wiring for all-domain-wall circuitry 
  • DPG Conference, Dresden, March 19 – 24, 2017: Functional domain walls in multiferroic oxides
  • Nano@NTNU Symposium, Trondheim, Nov. 17 – 18, 2016: Emergent functionality at domain walls in improper ferroelectrics
  • ISFD-13 International Symposium on Ferroic Domains & Micro- to Nano-scopic Structures, Vancouver, Oct. 2 – 6, 2016: Advanced domain-wall functionality in semiconducting improper ferroelectrics
  • ICTMC-20, Halle, Sept. 5 – 9, 2016: Functional domain walls in multiferroics
  • TOPO2016, International Workshop on Topological Structures in Ferroic Materials, Dresden, Aug. 16 – 19, 2016: Towards functional ferroic domain walls for all-domain-wall devices 
  • ISAF/ECAPD/PFM Conference 2016, Darmstadt, Aug. 21 – 25, 2016: Optimization and reversible reconfiguration of functional domain walls in improper ferroelectrics
  • DPG Conference, Regensburg, March 6 – 11, 2016: Functional domain walls in multiferroics
  • Theo Murphy meeting of the Royal Society, Buckinghamshire, Feb. 22 – 23, 2016: Transport properties in rare earth manganites and multiferroics
  • Ferroelectrics workshop, Leysin, Dec. 13 – 15, 2015: Domain walls in hexagonal manganites
  • FerroX workshop, Diamond Light Source, Oxfordshire, June 11 – 12, 2015: Advanced characterization and functionality of domain walls in multiferroics
  • TOPO2015, International Workshop on Topological Structures in Ferroic Materials, Sydney, May 19 – 21, 2015: Electronic transport and reconstruction phenomena at improper ferroelectric domain walls
  • DPG Conference, Berlin, March 15 – 20, 2015: Electronic reconstruction and charge state manipulation at ferroelectric domain walls
  • SCES 2014, Grenoble, July 7 – 11, 2014: Improper ferroelectric domain walls - anisotropic conductance and beyond
  • CIMTEC 2014, 13th International Ceramics Congress, Montecatini Terme, June 8 – 13, 2014: Multifunctional interfaces in ferroic oxides
  • LC Seminars, EPFL, Lausanne, April 25, 2014: Functional improper ferroelectric domain walls in multiferroics
  • APS March Meeting 2014, Denver, March 3 – 7, 2014: Anisotropic conductance at improper ferroelectric domain walls
  • EMA 2014, Orlando, Jan. 22 – 24, 2014: Exotic functional domain walls in multiferroics
  • TRR80 Seminar, University of Augsburg, Nov. 12, 2013: Domain walls in multiferroics – natural oxide interfaces with unique functionalities
  • Joint IMPRS/SFB Workshop on Nanoscience and -technology, Halle, Sept. 30 – Oct. 2, 2013: Unusual domain wall physics in multiferroics
  • PSI Summer School on Materials - Structure and Magnetism, Zuoz, Aug. 17 – 23, 2013: Ferroelectrics - materials and interactions
  • Paul Scherer Institut, Villigen, May 14, 2013: Unusual domain wall physics in multiferroic hexagonal manganites
  • DPG Conference, Berlin, March 25 – 29, 2012: Anisotropic conductance of ferroelectric domain walls
  • Condensed Matter Seminar, UC Santa Cruz, Oct. 7, 2011: Teamwork on mesoscopic length scales
  • 290 K Seminar, UC Berkeley, Sept. 12, 2011: The advantage of teamwork - Novel domain physics in improper ferroelectrics
  • Physics Colloquium, Dissertation Award Ceremonial, University of Bonn, June 10, 2011: Novel domain structures in magnetically induced ferroelectrics
  • DPG Conference, ThyssenKrupp Electrical Steel Dissertation Award, Dresden, March 15, 2010: Order parameters and domain topology in magnetically induced ferroelectrics
  • ISFD-10 International Symposium on Ferroic Domains and Micro- to Nanoscopic Structures, Prague, Sept. 20 – 24, 2010: Imaging and control of domains in a spin-spiral multiferroic
  • Oberseminar, Institut für Kondensierte Materie, TU Braunschweig, June 10, 2010: Domains in magnetically induced ferroelectrics
  • Symposium on Periodically-Modulated and Artificially Hetero-Structured Devices, Grasmere, May 18 – 20, 2009: Control of ferroelectric and antiferromagnetic domains in a spin-spiral multiferroic