2012/10/31 by Pavel A. Andreev, P. A. Andreev, L. S. Kuz’menkov +1 · 14 citations
Physics and Astronomy · #Bloch equations #Classical mechanics #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Current (fluid) #Ferromagnetism #Magnetic field #Physics #Quantum and electron transport phenomena #Quantum electrodynamics #Quantum mechanics #Random lasers and scattering media #Spin (aerodynamics) #Spin wave #Spintronics #cond-mat.mes-hall #physics.plasm-ph
paper · pdf · doi:10.1142/s0217979215500770
published in International Journal of Modern Physics B 29(13), 1550077 (World Scientific) · 10 pages, 2 figures
arxiv created 2013/06/17 · openalex publication_date 2015/04/01 · arxiv updated 2015/04/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Spin current is an important physical quantity in present day spintronics and it might be very useful in the physics of quantum plasmas of the spinning particles. Thus it is important to have an equation of the spin current evolution. This equation naturally appears as a part of the set of quantum hydrodynamic (QHD) equations. Consequently, we present the set of QHD equations derived from the many-particle microscopic Schrödinger equation, which consists of the continuity equation, the Euler equation, the Bloch equation and the equation of the spin current evolution. We use these equations to study the dispersion of the collective excitations in the three-dimensional samples of the magnetized dielectrics. We show that the dynamics of the spin current leads to the formation of new type of the collective excitations in the magnetized dielectrics, which we called the spin current waves. We focus our attention on the waves propagating perpendicular to the external magnetic field.