Transport noise crossovers in disordered electron nematics

Recently, low-frequency transport noise in underdoped YBCO was shown to exhibit an enhancement below 250K, consistent with fluctuations associated with a symmetry-breaking collective electronic state [1]. We discuss these results in relation to crossovers associated with the development of local electronic nematic order. Using a mapping of disordered electron nematics to random anisotropic resistor networks, we predict the thermal evolution of the noise power in transport associated with the crossover to local electron nematic behavior. \\[0pt] [1] Caplan et al., Phys. Rev. Lett. {\bf 104}, 177001 (2010).