Quantum crystal phase of electron liquid

Details Quantum crystal phase of electron liquid Quantum crystal phase of electron liquid

2006-12-06

arxiv.org/abs/cond-mat/0612154v1

Physics

Condensed Matter

Materials Science

4 pages, 2 figures

Scientific paper

A new bosonic, excitonic method for interacting electrons is developed. For two-dimensional electron liquid, it reveals a noncompensated quantum crystal phase ranging from the high density, or vanishing Coulomb interaction, limit: $r_s=0$, to a lower density $r_s\sim 10$, where a condensation of exciton pairs and the loss of the Fermi step is possible. The correlation energy and the static susceptibility, calculated using the method, are in agreement with the independent studies. A proof of the instability of the Fermi surface in the limit $r_s\to 0$ is given. The concept of quantum crystal is capable to explain the metal-insulator transition in Si field-effect heterostructures.

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