Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-08-22
Phys. Rev. B 83, 235309 (2011)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
11 pages, 5 figures
Scientific paper
We discuss by analytic means the theory of the high-density limit of the unpolarized two-dimensional electron liquid in the presence of Rashba or Dresselhaus spin-orbit coupling. A generalization of the ring-diagram expansion is performed. We find that in this regime the spin-orbit coupling leads to small changes of the exchange and correlation energy contributions, while modifying also, via repopulation of the momentum states, the noninteracting energy. As a result, the leading corrections to the chirality and total energy of the system stem from the Hartree-Fock contributions. The final results are found to be vanishing to lowest order in the spin-orbit coupling, in agreement with a general property valid to every order in the electron-electron interaction. We also show that recent quantum Monte Carlo data in the presence of Rashba spin-orbit coupling are well understood by neglecting corrections to the exchange-correlation energy, even at low density values.
Chesi Stefano
Giuliani Gabriele F.
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