Charge density waves in a quantum plasma

Article

关键词: 3-DIMENSIONAL ELECTRON-GAS;    GROUND-STATE;    MONTE-CARLO;    CORRELATION-ENERGY;    FUNCTIONAL THEORY;    PHASE-TRANSITION;    HYDROGEN;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.100.155132

来源: SCIE

【 摘 要 】

We analyze the instability of an unpolarized uniform quantum plasma consisting of two oppositely charged fermionic components with varying mass ratios against charge and spin density waves. Using density functional theory, we treat each component with the local spin density approximation and a rescaled exchange-correlation functional. Interactions between different components are treated with a mean-field approximation. In both two and three dimensions, we find leading unstable charge density wave modes in the second-order expansion of the energy functional, which would induce the transition to quantum liquid crystals. The transition point and the length of the wave vector are computed numerically. Discontinuous ranges of the wave vector are found for different mass ratios between the two components, indicating exotic quantum phase transitions. Phase diagrams are obtained, and a scaling relation is proposed to generalize the results to two-component fermionic plasmas with any mass scale. We discuss the implications of our results and directions for further improvement in treating quantum plasmas.

【 授权许可】

Free