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P. V. Pyshkin

Publications and source records attributed to P. V. Pyshkin.

23 records · Page 2Linked to original sources
arXiv2013

Strong spintronic magnetoelectric effect in layered magnetic metamaterial

It is shown that external magnetic field or magnetization induces electric polarization of microscopic isolated magnetic/non-magnetic hybrid structures due to the spin-dependent electron redistribution and mutual capacity. The magnetoelectric effect can be very strong, for instance the change of electric polarization reaches $100$ $μC/m^{2}$ at a constant magnetic field of only $1.5$ Tesla in the case of $100$ $÷$ $10$ nanometer structures which tightly fill the space, composing a metamaterial. The effect does not require using exotic compounds. Based on the obtained results we suggest a number of recommendations for future experimental design.

cond-mat.mes-hall↗
arXiv2013

Non-Linear Spin Dynamics Of The Electron Liquid In Nanosystems

We investigate the dynamics of spin-nonequilibrium electron systems in the hydrodynamic flow regime, when the normal scattering processes, which conserve the total quasi-momentum of the system of electrons and quasi-particles that interact with them, dominate over other scattering processes. We obtain a set of spin-hydrodynamic equations for the case of an arbitrary electron spectrum that varies slowly with the coordinates. Solving the one-dimensional non-linear problem we found the exact solutions both for the electrical potential in the open-ends circuit and for the spin-electrical oscillation in an inhomogeneous conducting ring. As we demonstrate, the oscillation characteristics are different in the cases of a magnetic ring and a non-magnetic ring to which the spin polarization was injected. We found also that a voltage between the ends of the open circuit may reveal the presence of an inhomogeneous spin polarization of the electron density.

cond-mat.mes-hall↗
arXiv2011

Dynamics of Spin-Polarized Electron Liquid and Spin Pendulum

We investigate the dynamics of spin-nonequilibrium electron systems for the case when normal electron collisions prevail over the other scattering processes and the "hydrodynamic flow" regime is realized. The hydrodynamic equations for the electron liquid have been obtained and analyzed. We demonstrate that oscillations of the spin polarization are possible in a conducting ring with inhomogeneous magnetic properties. These low-decay oscillations are accompanied by the oscillations of the drift current in the ring. We demonstrate also that the spin polarization of the electron density may be revealed via the voltage between the ends of the open circuit with an inhomogeneous spin polarization. The effect may be observed both in the hydrodynamic and diffusive regimes.

cond-mat.mes-hall↗
arXiv2011

The electrical resistance of spatially varied magnetic interface. The role of normal scattering

We investigate the diffusive electron transport in conductors with spatially inhomogeneous magnetic properties taking into account both impurity and normal scattering. It is found that the additional interface resistance that arises due to the magnetic inhomogeneity depends essentially on their spatial characteristics. The resistance is proportional to the spin flip time in the case when the magnetic properties of the conducting system vary smoothly enough along the sample. It can be used to direct experimental investigation of spin flip processes. In the opposite case, when magnetic characteristics are varied sharply, the additional resistance depends essentially on the difference of magnetic properties of the sides far from the interface region. The resistance increases as the frequency of the electron-electron scattering increases. We consider also two types of smooth interfaces: (i) between fully spin-polarized magnetics and usual magnetic (or non-magnetic) conductors, and (ii) between two fully oppositely polarized magnetic conductors. It is shown that the interface resistance is very sensitive to appearing of the fully spin-polarized state under the applied external field.

cond-mat.mes-hall↗