Higher derivatives driven symmetry breaking in holographic superconductors
arXiv:1910.07694 · doi:10.1140/epjc/s10052-020-7670-y
Abstract
In this paper, we construct a novel holographic superconductor from higher derivative (HD) gravity involving a coupling between the complex scalar field and the Weyl tensor. This HD coupling term provides a near horizon effective mass squared, which can violates IR Breitenlohner-Freedman (BF) bound by tuning the HD coupling and induces the instability of black brane such that the superconducting phase transition happens. We also study the properties of the condensation and the conductivity in the probe limit. We find that a wider extension of the superconducting energy gap ranging from 4.6 to 10.5 may provide a novel platform to model and interpret the phenomena in the real materials of high temperature superconductor.
arXiv comment23 pages, 12 figures; final version, to be published in EPJC
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