Pseudo-gap phase and duality in a holographic fermionic system with dipole coupling on Q-lattice

  • 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 and Jian-Pin Wu. Pseudo-gap phase and duality in a holographic fermionic system with dipole coupling on Q-lattice[J]. Chinese Physics C, 2016, 40(4): 043102. doi: 10.1088/1674-1137/40/4/043102
Yi Ling, Peng Liu, Chao Niu and Jian-Pin Wu. Pseudo-gap phase and duality in a holographic fermionic system with dipole coupling on Q-lattice[J]. Chinese Physics C, 2016, 40(4): 043102.  doi: 10.1088/1674-1137/40/4/043102 shu
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Received: 2015-07-23
Revised: 2015-10-23
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    Supported by National Natural Science Foundation of China(11275208, 11305018, 11178002), Jiangxi Young Scientists(JingGangStar) Progran and 555 Talent Project of Jiangxi Province, Liaoning Excellent Talents in University(LJQ2014123)

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Pseudo-gap phase and duality in a holographic fermionic system with dipole coupling on Q-lattice

    Corresponding author: Yi Ling,
    Corresponding author: Peng Liu,
    Corresponding author: Chao Niu,
    Corresponding author: Jian-Pin Wu,
Fund Project:  Supported by National Natural Science Foundation of China(11275208, 11305018, 11178002), Jiangxi Young Scientists(JingGangStar) Progran and 555 Talent Project of Jiangxi Province, Liaoning Excellent Talents in University(LJQ2014123)

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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