The Spin Mass of an Electron Liquid

Details The Spin Mass of an Electron Liquid The Spin Mass of an Electron Liquid

2004-03-13

arxiv.org/abs/cond-mat/0403342v1

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.93.106601

We show that in order to calculate correctly the {\it spin current} carried by a quasiparticle in an electron liquid one must use an effective "spin mass" $m_s$, that is larger than both the band mass, $m_b$, which determines the charge current, and the quasiparticle effective mass $m^*$, which determines the heat capacity. We present microscopic calculations of $m_s$ in a paramagnetic electron liquid in three and two dimensions, showing that the mass enhancement $m_s/m_b$ can be a very significant effect.

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