Calculated DOS as a function of B at T = 18 mK. Here, E = 0 meV corresponds to E F . For the data fitting at different temperatures, we modelled the temperature dependence of the condensation parameter, M ( T ), as M ( T ) = M 0 (1 T / T *) 1/2 where M 0 is a fitting parameter, which is universally true for any mean field theory including holographic theory. We chose M 0 such that the theory fitted the data at a particular temperature best, which we took as T = 100 mK. The same parameters were then used to see how the theory could fit the data for other temperatures. Similarly, for the magnetic field evolution, we modelled the magnetic-field dependence of the condensation as M ( T ) = M 0 (1 T / T * B / B c ) 1/2 , where T * is the critical temperature at B = 0 G and similarly B c is the critical field at T = 0 K. For calculations, we took T * = 147 mK, B c = 1,600 G and M 0 = 5.44. The magnetic phase boundary in the T B plane (Fig. 4 ) is simply given by the M = 0 curve: T / T * B / B c = 1. Note that the theory does not capture the transition to the ZBA in a DFL. a.u., arbitrary units.
