A5031837137- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Electronic and Structural Properties of Oxides
- Acoustic Wave Resonator Technologies
- Particle Detector Development and Performance
- Force Microscopy Techniques and Applications
- Dark Matter and Cosmic Phenomena
- Non-Destructive Testing Techniques
- Atomic and Subatomic Physics Research
- Sensor Technology and Measurement Systems
- Dielectric materials and actuators
- Radiation Detection and Scintillator Technologies
- CCD and CMOS Imaging Sensors
- Ultrasonics and Acoustic Wave Propagation
Norwegian University of Science and Technology
2023-2024
University of Bonn
2022
Abstract Extraordinary physical properties arise at polar interfaces in oxide materials, including the emergence of 2D electron gases, sheet‐superconductivity, and multiferroicity. A special type interface is ferroelectric domain walls, where electronic reconstruction phenomena can be driven by bound charges. Great progress has been achieved characterization such walls and, over last decade, their potential for next‐generation nanotechnology become clear. Established tomography techniques,...
Engineering of ferroelectric domain structures enables direct control over the switching dynamics and is crucial for tuning functional properties ferroelectrics various applications, ranging from capacitors to future nanoelectronics. Here, we investigate formation in poly- single-crystalline improper hexagonal DyMnO3. We show that a non-uniform grain-size distribution polycrystal facilitates coexistence multi-scale domains, varying by up one order magnitude size. This unusual structure...
Abstract Piezoresponse force microscopy (PFM) is used for investigation of the electromechanical behavior head‐to‐head (H‐H) and tail‐to‐tail (T‐T) domain walls on non‐polar surfaces three uniaxial ferroelectric materials with different crystal structures: LiNbO 3 , Pb 5 Ge O 11 ErMnO . It shown that, contrary to common expectation that should not exhibit any PFM response surface, an out‐of‐plane deformation at H‐H T‐T occurs even in absence polarization component due a specific form...
Moiré physics plays an important role in characterization of functional materials and engineering physical properties general, ranging from strain-driven transport phenomena to superconductivity. Here, we report on the observation moiré fringes conductive atomic force microscopy (cAFM) scans gained model ferroelectric Er(Mn,Ti)O3. By performing a systematic study impact key experimental parameters emergent fringes, such as scan angle pixel density, demonstrate that observed arise due...
Engineering of ferroelectric domain structures enables direct control over the switching dynamics and is crucial for tuning functional properties ferroelectrics various applications, ranging from capacitors to future nanoelectronics. Here, we investigate formation in poly- single crystalline improper DyMnO3. We show that a non-uniform grain-size distribution polycrystals facilitates coexistence multi-scale domains, varying by up one order magnitude size. This unusual structure originates an...
Domain walls in ferroelectric oxides provide fertile ground for the development of next-generation nanotechnology. Examples include domain-wall-based memory, memristors, and diodes, where unusual electronic properties quasi-2D nature are leveraged to emulate behavior components at ultra-small length scales. Here, we demonstrate atmosphere-related reversible changes conduction neutral domain Er(Mn,Ti)O$_3$. By exposing system reducing oxidizing conditions, drive from insulating conducting,...
In gaseous detectors it is possible to determine the polarization of an X-ray beam by tracking photoelectrons which are created in photoelectric interactions photons with gas molecules. Based on differential cross section this interaction emission angle correlated plane beam. Depending photon energy and scattering molecules length relevant part track only order a few hundred microns. Thus, high resolution needed. This achieved GridPix [1] - combination highly granular Timepix pixel ASIC [2]...
Extraordinary physical properties arise at polar interfaces in oxide materials, including the emergence of two-dimensional electron gases, sheet-superconductivity, and multiferroicity. A special type interface are ferroelectric domain walls, where electronic reconstruction phenomena can be driven by bound charges. Great progress has been achieved characterization such walls and, over last decade, their potential for next-generation nanotechnology become clear. Established tomography...