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arXiv · 1602.06062

The pseudo-gap phase and the duality in holographic fermionic system with dipole coupling on Q-lattice

Yi Ling·Peng Liu·Chao Niu·Jian-Pin Wu
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Abstract

We classify the different phases by the "pole-zero mechanism" for a holographic fermionic system which contains a dipole coupling with strength $p$ on a Q-lattice background. A complete phase structure in $p$ space can be depicted in terms of Fermi liquid, non-Fermi liquid, Mott phase and pseudo-gap phase. In particular, we find that in general the region of the pseudo-gap phase in $p$ space is suppressed when the Q-lattice background is dual to a deep insulating phase, while for an anisotropic background, we have an anisotropic region for the pseudo-gap phase in $p$ space as well. In addition, we find that the duality between zeros and poles always exists regardless of whether or not the model is isotropic.

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Yi Ling, Peng Liu, Chao Niu, Jian-Pin Wu. 2016-02-19. The pseudo-gap phase and the duality in holographic fermionic system with dipole coupling on Q-lattice. https://doi.org/10.1088/1674-1137%2F40%2F4%2F043102

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