A Novel Insulator by Holographic Q-lattices
High Energy Physics - Theory
2016-02-22 v2 General Relativity and Quantum Cosmology
Abstract
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.
Keywords
Cite
@article{arxiv.1510.05456,
title = {A Novel Insulator by Holographic Q-lattices},
author = {Yi Ling and Peng Liu and Jian-Pin Wu},
journal= {arXiv preprint arXiv:1510.05456},
year = {2016}
}
Comments
14 pages, 6 figures