Can-Li Song, Jennifer E. Hoffman
Scanning tunneling microscopy (STM) has made tremendous progress in the study and understanding of both classical and unconventional superconductors. This has motivated a rapidly growing effort to apply the same techniques to the iron-based high-Tc superconductors since their discovery in 2008. Four years have brought exciting advances in imaging and spectroscopic investigation of this new class of materials. In this review, we focus on several recent STM contributions to the identification of the gap symmetry and the pairing glue. We highlight the unique capabilities and challenges still ahead for STM studies of iron-based superconductors.
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http://arxiv.org/abs/1212.5164
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