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9 papers · 2 filters
Comparative study of phase transitions in polycrystalline and epitaxial BaTiO3 thin films by means of specific heat measurements
B. Strukov, S. Davitadze, V. Lemanov +3
The experimental data on the thermal properties of the nanostructured perovskite ferroelectrics are presented and analysed. The ability of the modified 3w method for specific heat…
Exciton spin decay modified by strong electron-hole exchange interaction
G. V. Astakhov, A. V. Koudinov, K. V. Kavokin +7
We study exciton spin decay in the regime of strong electron-hole exchange interaction. In this regime the electron spin precession is restricted within a sector formed by the exte…
Single-particle states in spherical Si/SiO quantum dots
A. S. Moskalenko, J. Berakdar, A. A. Prokofiev +1
We calculate ground and excited electron and hole levels in spherical Si quantum dots inside SiO in a multiband effective mass approximation. Luttinger Hamiltonian is used for…
Optical spin pumping of modulation doped electrons probed by a two-color Kerr rotation technique
H. Hoffmann, G. V. Astakhov, T. Kiessling +5
We report on optical spin pumping of modulation electrons in CdTe-based quantum wells with low intrinsic electron density (by 10^10 cm^{-2}). Under continuous wave excitation, we r…
Anharmonicity of BaTiO_3 single crystals
Y. L. Wang, A. K. Tagantsev, D. Damjanovic +3
By analyzing the dielectric non-linearity with the Landau thermodynamic expansion, we find a simple and direct way to assess the importance of the eighth order term. Following this…
The effect of electronic entropy on temperature peculiarities of the frequency characteristics of two interacting anharmonic vibrational modes in Zr
V. Yu. Trubitsin
A 2D temperature-dependent effective potential is calculated for the interacting longitudinal and transverse phonons of zirconium in the frozen-phonon model. The effective…