Mechanism for Negative Differential Conductivity in Holographic Conductors
arXiv:2008.00904 · doi:10.1007/JHEP12(2020)124
Abstract
We clarify the mechanism for negative differential conductivity in holographic conductors. Negative differential conductivity is a phenomenon in which the electric field decreses with the increase of the current. This phenomenon is widely observed in strongly correlated insulators, and it has been known that some models of AdS/CFT correspondence (holographic conductors) reproduces this behaviour. We study the mechanism for negative differential conductivity in holographic conductors by analyzing the lifetime of the bound states of the charge carriers. We find that when the system exhibits negative differential conductivity, the lifetime of the bound states grows as the electric field increases. This suggests that the negative differential conductivity in this system is realized by the supression of the ionization of the bound states that supplies the free carriers.
arXiv commentv1: 14 pages, 5 figures, v2: minor corrections; version accepted in JHEP
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- Holographic D-brane constructions with dynamical gauge fields
- Patchwork Conditions for Holographic Nonlinear Responses: A Computational Method for Electric Conductivity and Friction Coefficient