2000 character limit reached
Counting Majorana zero modes in superconductors (1011.1007v2)
Published 3 Nov 2010 in cond-mat.supr-con and hep-th
Abstract: A counting formula for computing the number of (Majorana) zero modes bound to topological point defects is evaluated in a gradient expansion for systems with charge-conjugation symmetry. This semi-classical counting of zero modes is applied to some examples that include graphene and a chiral p-wave superconductor in two-dimensional space. In all cases, we explicitly relate the counting of zero modes to Chern numbers.