Weakly Relativistic Quantum Effects in a Two-Dimensional Electron Gas: Dispersion of Langmuir Waves

作者：Andreev P A^*; Ivanov A Yu

来源：Russian Physics Journal, 2015, 57(9): 1210-1219.

DOI：10.1007/s11182-015-0365-4

• quantum hydrodynamics
• weakly relativistic effects
• Darwin term
• two-dimensional electron gas
• Langmuir waves
• quantum plasma

A weakly-relativistic quantum-hydrodynamic model for charged spinless particles applied to low-dimensional systems is described in detail. The equations are constructed in the self-consistent field approximation. The Darwin term, the current-current interaction, and the weakly relativistic correction to the kinetic energy, all described by the Breit Hamiltonian, are considered together with the Coulomb interaction. The contributions of the described effects and also of relativistic-temperature effects to the dispersion of the Langmuir waves in a two-dimensional electron gas are calculated. A comparison with the corresponding formula for a three-dimensional system of particles is presented.

• 出版日期2015-1