Blar i NTNU Open på forfatter "Shapovalov, Konstantin"
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Conductivity control via minimally invasive anti-Frenkel defects in a functional oxide
Evans, Donald; Holstad, Theodor Secanell; Mosberg, Aleksander Buseth; Småbråten, Didrik Rene; Vullum, Per Erik; Dadlani, Anup; Shapovalov, Konstantin; Yan, Zewu; Bourret, Edith; Gao, David Zhe; Akola, Jaakko; Torgersen, Jan; Van Helvoort, Antonius; Selbach, Sverre Magnus; Meier, Dennis (Peer reviewed; Journal article, 2020)Utilizing quantum effects in complex oxides, such as magnetism, multiferroicity and superconductivity, requires atomic-level control of the material’s structure and composition. In contrast, the continuous conductivity ... -
Electrostatic potential mapping at ferroelectric domain walls by low-temperature photoemission electron microscopy
Schaab, Jakob; Shapovalov, Konstantin; Schoenherr, Peggy; Hackl, Johanna; Khan, Muhammad Imtiaz; Hentschel, Mario; Yan, Zewu; Bourret, Edith; Schneider, Claus M.; Nemsak, Slavomír; Stengel, Massimiliano; Cano, Andrés; Meier, Dennis (Journal article; Peer reviewed, 2019)Low-temperature X-ray photoemission electron microscopy (X-PEEM) is used to measure the electric potential at domain walls in improper ferroelectric Er0.99Ca0.01MnO3. By combining X-PEEM with scanning probe microscopy and ... -
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 ... -
Measuring ferroelectric order parameters at domain walls and vortices in hexagonal manganites with atomic resolution STEM
Holtz, Megan, E.; Shapovalov, Konstantin; Mundy, Julia; Chang, C. S.; Meier, Dennis; Cano, Andrés; Muller, David A. (Journal article; Peer reviewed, 2017) -
Observation of uncompensated bound charges at improper ferroelectric domain walls
Schoenherr, Peggy; Shapovalov, Konstantin; Schaab, Jakob; Yan, Zewu; Bourret, Edith; Hentschel, Mario; Stengel, Massimiliano; Fiebig, Manfred; Cano, Andrés; Meier, Dennis (Journal article; Peer reviewed, 2019)Low-temperature electrostatic force microscopy (EFM) is used to probe unconventional domain walls in the improper ferroelectric semiconductor Er0.99Ca0.01MnO3 down to cryogenic temperatures. The low-temperature EFM maps ... -
The Third Dimension of Ferroelectric Domain Walls
Roede, Erik Dobloug; Shapovalov, Konstantin; Moran, Thomas; Mosberg, Aleksander Buseth; Yan, Zewu; Bourret, Edith; Cano, Andres; Huey, Bryan D.; Van Helvoort, Antonius; Meier, Dennis (Peer reviewed; Journal article, 2022)Ferroelectric domain walls are quasi-2D systems that show great promise for the development of nonvolatile memory, memristor technology, and electronic components with ultrasmall feature size. Electric fields, for example, ... -
Topological defects in hexagonal manganites - Inner structure and emergent electrostatics
Holtz, Megan, E.; Shapovalov, Konstantin; Mundy, Julia; Chang, C. S.; Yan, Zewu; Bourret, Edith; Muller, David A.; Meier, Dennis; Cano, Andrés (Journal article; Peer reviewed, 2017)Diverse topological defects arise in hexagonal manganites, such as ferroelectric vortices, as well as neutral and charged domain walls. The topological defects are intriguing because their low symmetry enables unusual ...