Gravity dual of spin and charge density waves
arXiv:1408.1397 · doi:10.1007/JHEP12(2014)083
Abstract
At high enough charge density, the homogeneous state of the D3-D7' model is unstable to fluctuations at nonzero momentum. We investigate the end point of this instability, finding a spatially modulated ground state, which is a charge and spin density wave. We analyze the phase structure of the model as a function of chemical potential and magnetic field and find the phase transition from the homogeneous state to be first order, with a second-order critical point at zero magnetic field.
26 pages, 16 figures; v2: refs. fixed and added; v3: refs. and discussion added, published version
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