Formation of Electronic Nematic Phase in Interacting Systems

Details Formation of Electronic Nematic Phase in Interacting Systems Formation of Electronic Nematic Phase in Interacting Systems

2004-02-23

arxiv.org/abs/cond-mat/0402565v2

Phys. Rev. B v.70 p.155110 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

revtex4, 6 pages, 6 figures; revised introduction, updated references

Scientific paper

10.1103/PhysRevB.70.155110

We study the formation of an electronic nematic phase characterized by a broken point-group symmetry in interacting fermion systems within the weak coupling theory. As a function of interaction strength and chemical potential, the phase transition between the isotropic Fermi liquid and nematic phase is first order at zero temperature and becomes second order at a finite temperature. The transition is present for all typical, including quasi-2D, electronic dispersions on the square lattice and takes place for arbitrarily small interaction when at van Hove filling, thus suppressing the Lifshitz transition. In connection with the formation of the nematic phase, we discuss the origin of the first order transition and competition with other broken symmetry states.

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