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Phase diagram of the low-density two-dimensional homogeneous electron gas

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Article number126402
<mark>Journal publication date</mark>24/03/2009
<mark>Journal</mark>Physical review letters
Issue number12
Number of pages4
Publication StatusPublished
<mark>Original language</mark>English


We use quantum Monte Carlo methods to calculate the zero-temperature phase diagram of the two-dimensional homogeneous electron gas. We find a transition from a paramagnetic fluid to an antiferromagnetic triangular Wigner crystal at density parameter rs=31(1)  a.u. and a transition to a ferromagnetic crystal at rs=38(5)  a.u. The fully spin-polarized fluid is never stable. We search for, but do not find, the ferromagnetic “hybrid” phase proposed by H. Falakshahi and X. Waintal [ Phys. Rev. Lett. 94 046801 (2005)].

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© 2009 The American Physical Society