due to electron-hole attraction. For pairing channels, we find positive anomalous dimensions, consistent with this view. The local pairing channel has $\eta_{pairing} = \frac{u^*}{5}= \frac{3}{30 N_f + 8}\epsilon$.

Using these results, we obtain thermodynamic responses such as the specific heat, $c_v \sim T^{d/z}\approx T^{1.7}$ and the spin susceptibility $\chi(T) \sim a+b \,T^{(d-z+2\eta_{12})/z}\approx a + b \,
T^{0.5}$, with some constants $a,b$. Interestingly, the non-linear susceptibility $\chi_3 = \left.\partial^3 M/\partial H^3\right|_{H=0}
\sim T^{-(3z-4\eta_{12}-d)/z} \approx T^{-1.7}$ diverges, as in spin glasses but with completely different physics. Comparing the scaling of current and electric field gives the usual result $[\sigma_{ij}] =d-2$. Consequently, the temperature and frequence dependence of the conductivity is $\sigma(\omega,T) \sim T^{1/z}
\mathcal{F}(\omega/T)$, and a [*clean, undoped*]{} LAB is therefore a power-law insulator. We now turn to the effect of applied strain and Zeeman field upon the LAB. These perturbations break cubic/time-reversal symmetries, and thus destabilize the LAB. Due to the isotropic nature of the LAB fixed point, the response to the Zeeman field alone is to leading order independent of its direction (the cubic mass $1/M_c$ can be “dangerously irrelevant”, however – see below), so we take it to lie along the (001) direction. We consider for simplicity tetragonal strain 