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5 papers · 2 filters
Possible Coexistence of Rotational and Ferroelectric Lattice Distortions in Rhombohedral PZT
M. Fornari, D. J. Singh
The competitions between ferroelectric and rotational instabilities in rhombohedral PZT near x = 0.5 are investigated using first principles density functional supercell calculatio…
Tunneling of Bloch electrons through vacuum barrier
I. I. Mazin
Tunneling of Bloch electrons through a vacuum barrier introduces new physical effects in comparison with the textbook case of free (plane wave) electrons. For the latter, the expon…
The origin of high transport spin polarization in LaSrMnO: direct evidence for minority spin states
B. Nadgorny, I. I. Mazin, M. Osofsky +7
Using the point contact Andreev reflection technique, we have carried out a systematic study of the spin polarization in the colossal magnetoresistive manganite, LaSr$_{0.3…
Simultaneously imaging of dielectric properties and topography in a PbTiO_3 crystal by near-field scanning microwave microscopy
Y. G. Wang, M. E. Reeves, F. J. Rachford
We use a near-field scanning microwave microscope to simultaneously image the dielectric constant, loss tangent, and topography in a PbTiO_3 crystal. By this method, we study the e…
Robust half-metallicity and metamagnetism in Fe_{x}Co_{1-x}S_{2}
I. I. Mazin
The Fe_{x}Co_{1-x}S_{2} system is predicted, on the basis of density functional calculations, to be a half metal for a large range of concentrations. Unlike most known half metals,…