Fluctuating spin density waves in metals

Details Fluctuating spin density waves in metals Fluctuating spin density waves in metals

2009-07-22

arxiv.org/abs/0907.3732v2

Physical Review B 80, 155129 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

15 pages, 2 figures; (v2) Improved figures

Scientific paper

10.1103/PhysRevB.80.155129

Recent work has used a U(1) gauge theory to describe the physics of Fermi pockets in the presence of fluctuating spin density wave order. We generalize this theory to an arbitrary band structure and ordering wavevector. The transition to the large Fermi surface state, without pockets induced by local spin density wave order, is described by embedding the U(1) gauge theory in a SU(2) gauge theory. The phase diagram of the SU(2) gauge theory shows that the onset of spin density wave order in the Fermi liquid occurs either directly, in the framework discussed by Hertz, or via intermediate non-Fermi liquid phases with Fermi surfaces of fractionalized excitations. We discuss application of our results to the phase diagram of the cuprates.

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