It has been noted previously that the sizable areal density of midgap states which must exist on any non-{ n0m} surface of a d-wave superconductor can lead to a giant magnetic moment. Here we show that this effect is observable, and discuss two precise ways to observe it: (i) by directly measuring magnetic moment in a system with a large density of internal { 110} surfaces, or (ii) by performing spin-polarized tunneling on a { 110} surface. In both cases a sufficiently large magnetic field should be applied in the [1$\bar 1$0] direction.
Categories: cond-mat.supr-con