Real-time three-dimensional profiling of ferroelectric domain walls

2015 ◽  
Vol 107 (15) ◽  
pp. 152905 ◽  
Author(s):  
T. Kämpfe ◽  
P. Reichenbach ◽  
A. Haußmann ◽  
T. Woike ◽  
E. Soergel ◽  
...  
Keyword(s):  
Real Time ◽  
Domain Walls ◽  
Three Dimensional ◽  
Ferroelectric Domain

Luminescence and Raman Based Real Time Imaging of Ferroelectric Domain Walls

2006 ◽  
Vol 966 ◽  
Author(s):  
Volkmar Dierolf ◽  
Pavel Capek ◽  
Christian Sandmann
Keyword(s):  
Raman Spectroscopy ◽  
Domain Wall ◽  
Real Time ◽  
Electric Fields ◽  
Domain Walls ◽  
Ferroelectric Domain ◽  
Rare Earth Ions ◽  
The Other ◽  
Current Status ◽  
Sensitive Tool

ABSTRACTWe studied ferroelectric domain wall regions in lithium niobate using the photoluminescence of intentionally doped rare earth ions (such as Er3+) as well as Raman spectroscopy and present an overview of the current status of our ongoing investigations. We find that the Er emission is a sensitive tool to observe changes in local electric fields as well as reconfiguration of defect dipoles across the domain wall. The Raman spectra, on the other hand can be used to identify charges that accumulate asymmetrically across a domain wall. We further demonstrate that the imaging methods offer sufficient sensitivity to observe the changes associated with a domain in real time while it is moving.

Three-Dimensional Optical Analysis of Ferroelectric Domain Walls

Domain Walls ◽  
2020 ◽  
pp. 152-184
Author(s):  
A. Haußmann ◽  
L. M. Eng ◽  
S. Cherifi-Hertel
Keyword(s):  
Physical Properties ◽  
Domain Walls ◽  
Domain Boundary ◽  
Three Dimensional ◽  
Ferroelectric Domain ◽  
Ferroelectric Materials ◽  
Optical Methods ◽  
Fundamental Interest ◽  
Nanoscale Interfaces ◽  
3D Profile

This chapter presents the latest results demonstrating the flexibility and sensitivity of optical methods for the investigation of the physical properties of DWs in 3D. Domain walls in ferroelectric materials are nanoscale interfaces separating regions with different orientation of the polarization. They have long been considered as imperfections affecting the overall macroscopic properties of ferroelectrics. However, the recently discovered rich and diverse local physical properties of ferroelectric DWs have transformed these domain boundary regions into individual nanostructures with significant fundamental interest and potentially viable application in nanoelectronic device components. This chapter emphasizes the important contribution of both nonlinear and linear optical microscopy in different geometries (transmission, reflection, and non-collinear geometry) to access the detailed morphology of ferroelectric domain walls, obtain their 3D profile, access their internal structure, and establish correlations with their electronic properties.

scholarly journals Topological charge transport by mobile dielectric-ferroelectric domain walls

2019 ◽  
Vol 5 (11) ◽  
pp. eaax8720 ◽  
Author(s):  
R. Takehara ◽  
K. Sunami ◽  
K. Miyagawa ◽  
T. Miyamoto ◽  
H. Okamoto ◽  
...  
Keyword(s):  
Charge Transport ◽  
Topological Charge ◽  
Degrees Of Freedom ◽  
Domain Walls ◽  
Energy Gap ◽  
Three Dimensional ◽  
Ferroelectric Domain ◽  
Present Observation ◽  
Thermoelectric Effects ◽  
Topological Charges

The concept of topology has been widely applied in condensed matter physics, leading to the identification of peculiar electronic states on three-dimensional (3D) surfaces or 2D lines separating topologically distinctive regions. In the systems explored so far, the topological boundaries are built-in walls; thus, their motional degrees of freedom, which potentially bring about new paradigms, have been experimentally inaccessible. Here, working with a quasi-1D organic material with a charge-transfer instability, we show that mobile neutral-ionic (dielectric-ferroelectric) domain boundaries with topological charges carry strongly 1D-confined and anomalously large electrical conduction with an energy gap much smaller than the one-particle excitation gap. This consequence is further supported by nuclear magnetic resonance detection of spin solitons, which are required for steady current of topological charges. The present observation of topological charge transport may open a new channel for broad charge transport–related phenomena such as thermoelectric effects.

Imaging of ferroelectric domain walls by electron holography

1992 ◽  
Vol 50 (1) ◽  
pp. 246-247
Author(s):  
Xiao Zhang
Keyword(s):  
Magnetic Field ◽  
High Resolution ◽  
Domain Walls ◽  
Ferroelectric Domain ◽  
Object Wave ◽  
Electron Holography ◽  
High Resolution Imaging ◽  
Quantitative Measurements ◽  
Resolution Imaging ◽  
Electron Microscopes

Electron holography has recently been available to modern electron microscopy labs with the development of field emission electron microscopes. The unique advantage of recording both amplitude and phase of the object wave makes electron holography a effective tool to study electron optical phase objects. The visibility of the phase shifts of the object wave makes it possible to directly image the distributions of an electric or a magnetic field at high resolution. This work presents preliminary results of first high resolution imaging of ferroelectric domain walls by electron holography in BaTiO3 and quantitative measurements of electrostatic field distribution across domain walls.

Evaluation of the mitral valve by transthoracic real-time three-dimensional echocardiography

2010 ◽  
Vol 151 (21) ◽  
pp. 854-863 ◽  
Author(s):  
Attila Nemes ◽  
Marcel L. Geleijnse ◽  
Osama I. I. Soliman ◽  
Wim B. Vletter ◽  
Jackie S. McGhie ◽  
...  
Keyword(s):  
Mitral Valve ◽  
Real Time ◽  
Three Dimensional ◽  
Dimensional Echocardiography ◽  
Three Dimensional Echocardiography

Jelenleg az echokardiográfia a legszéleskörűbben alkalmazott rutin noninvazív diagnosztikus eljárás, amelynek segítségével a mitralis billentyű morfológiája és funkciója jellemezhető. Ennek az összefoglaló jellegű közleménynek a célja az egyik legújabb echokardiográfiás fejlesztés, a transthoracalis real-time háromdimenziós echokardiográfia szerepének bemutatása a mitralis billentyű vizsgálatában.

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