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Magnetism in La2O3(Fe1-xMnx)(2)Se-2 tuned by Fe/Mn ratio
(Physical Review B: Condensed Matter and Materials Physics, 2012)
We report the evolution of structural and magnetic properties in La2O3(Fe1-xMnx)(2)Se-2. Heat capacity and bulk magnetization indicate an increased ferromagnetic component of the long-range magnetic order and possible ...
Dynamic polarization of graphene by moving external charges: Random phase approximation
(Physical Review B: Condensed Matter and Materials Physics, 2009)
We evaluate the stopping and image forces on a charged particle moving parallel to a doped sheet of graphene by using the dielectric-response formalism for graphenes pi-electron bands in the random phase approximation ...
Dynamic polarization of graphene by external correlated charges
(Physical Review B: Condensed Matter and Materials Physics, 2012)
We use the dielectric response formalism within random phase approximation for graphenes pi-electron bands to study polarization of doped, single-layer graphene in the presence of a moving dipole and a pair of comoving ...
Polarization of supported graphene by slowly moving charges
(Physical Review B: Condensed Matter and Materials Physics, 2008)
We describe the dynamic polarization of graphenes pi electrons by means of the Vlasov equations in the relaxation-time approximation and evaluate the stopping and the image forces on slow ions moving parallel to a supported ...
High-energy plasmon spectroscopy of freestanding multilayer graphene
(Physical Review B: Condensed Matter and Materials Physics, 2011)
We present several applications of the layered electron gas model to electron energy loss spectroscopy of freestanding films consisting of N graphene layers in a scanning transmission electron microscope. Using a two-fluid ...
Discrete solitons in an array of quantum dots
(Physical Review B: Condensed Matter and Materials Physics, 2013)
We develop a theory for the interaction of classical light fields within a chain of coupled quantum dots (QDs), in the strong-coupling regime, taking into account the local-field effects. The QD chain is modeled by a ...
Optimization of intersubband resonant second-order susceptibility in asymmetric graded AlxGa1-xAs quantum wells using supersymmetric quantum mechanics
(Physical Review B: Condensed Matter and Materials Physics, 1997)
A systematic procedure is proposed for the design of ternary alloys based quantum-well structures optimized for double-resonance second-harmonic generation. The method relies on the supersymmetric quantum mechanics as ...
Mesoscopic phase separation in NaxCoO2 (0.65 LT = x LT = 0.75)
(Physical Review B: Condensed Matter and Materials Physics, 2004)
Nuclear magnetic resonace (NMR), EPR and magnetization measurements in NaxCoO2 for 0.65less than or equal toxless than or equal to0.75 are presented. While the EPR signal arises from Co4+ magnetic moments ordering at ...
Interplay between mesoscopic phase separation and bulk magnetism in the layered NaxCoO2
(Physical Review B: Condensed Matter and Materials Physics, 2005)
Specific heat of layered NaxCoO2 (x=0.65, 0.70, and 0.75) oxides has been measured in the temperature range of 3-360 K and magnetic fields of 0 and 9 T. The analysis of data, assuming the combined effect of interlayer ...
Magnetic and Mossbauer studies of CaRu(1-)xM(x)O(3) (M = Ti and Fe)
(Physical Review B: Condensed Matter and Materials Physics, 2002)
CaRuO3 is a perovskite with an orthorhombic distortion and shows the characteristics of spin-glass behavior below T-C=87 K. Magnetic studies of polycrystalline CaRu1-xTixO3 (0 LT x LT 0.1) reveal that a ferromagnetic ...