The deviation of the first internal Kasner exponent from the Schwarzschild value scales as the square of the condensate, giving temperature exponents 1/r at r-th order multicritical points.
A Simple Holographic Insulator
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We present a simple holographic model of an insulator. Unlike most previous holographic insulators, the zero temperature infrared geometry is completely nonsingular. Both the low temperature DC conductivity and the optical conductivity at zero temperature satisfy power laws with the same exponent, given by the scaling dimension of an operator in the IR. Changing a parameter in the model converts it from an insulator to a conductor with a standard Drude peak.
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Critical and multicritical Kasner scaling in holographic phase transitions
The deviation of the first internal Kasner exponent from the Schwarzschild value scales as the square of the condensate, giving temperature exponents 1/r at r-th order multicritical points.