Direct observation of polar tweed in LaAlO3
نویسندگان
چکیده
منابع مشابه
Direct observation of polar tweed in LaAlO3
Polar tweed was discovered in mechanically stressed LaAlO3. Local patches of strained material (diameter ca. 5 μm) form interwoven patterns seen in birefringence images, Piezo-Force Microscopy (PFM) and Resonant Piezoelectric Spectroscopy (RPS). PFM and RPS observations prove unequivocally that electrical polarity exists inside the tweed patterns of LaAlO3. The local piezoelectric effect varies...
متن کاملTHE TWEED PROFILE published by THE CHARLES H . TWEED
Introduction: Angle Class II division 1 patients with a large ANB and severe discrepancies arefrequently found in the Japanese population. In such severe Class II patients, it is difficult to improve theprotrusive profile with only premolar extraction. Additional first-molar extraction (AFME) is aprocedure that can be done after premolar extraction space closure for patients who hav...
متن کاملDirect Observation
The term “non–intrusive” is often used to characterise this technique: Users do what they normally do without being disturbed by the observ e r s . One of the advantages of this method is that users can be observed in the e n v i ronment where the system is normally used. This is why dire c t o b s e rvation is said to have high face validity, also re f e rred to as extern a l validity or ecolo...
متن کاملObservation of the "missing" polar OCS dimer.
A new infrared band at 2069.3 cm-1 is observed and assigned to the long-anticipated polar isomer of the OCS dimer, helping to explain apparent discrepancies among earlier studies. The data reported here should enable direct observation of the microwave spectrum of polar (OCS)2 and motivate new theoretical works on the energetics of OCS dimer isomers and interconversion energy barriers.
متن کاملAvoiding the polarization catastrophe in LaAlO3 overlayers on SrTiO3(001) through polar distortion.
A pronounced uniform polar distortion extending over several unit cells enables thin LaAlO3 overlayers on SrTiO3(001) to counteract the charge dipole and thereby neutralize the "polarization catastrophe" that is suggested by simple ion counting. This unanticipated mechanism, obtained from density functional theory calculations, allows several unit cells of the LaAlO3 overlayer to remain insulat...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Scientific Reports
سال: 2016
ISSN: 2045-2322
DOI: 10.1038/srep27193