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A Novel Insulator by Holographic Q-lattices

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arxiv 1510.05456 v2 pith:33SK32KT submitted 2015-10-19 hep-th gr-qc

A Novel Insulator by Holographic Q-lattices

Yi Ling , Peng Liu , Jian-Pin Wu This is my paper
classification hep-th gr-qc
keywords insulatornovelconductivityexhibitsinsulatingmottphasesome
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We construct a bulk geometry with Q-lattice structure, which is implemented by two gauge fields and a coupling between the lattice and the Maxwell field. This gravity dual model can describe a novel insulator which exhibits some key features analogous to Mott insulator. In particular, a hard gap in insulating phase as well as vanishing DC conductivity can be simultaneously achieved. In addition, we discuss the non-Drude behavior of the optical conductivity in low frequency region in insulating phase, which exhibits some novel characteristics different from ordinary Mott insulator.

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Cited by 3 Pith papers

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