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24 April 2024 |
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Article overview
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Strong similarities between the local electronic structure of insulating iron pnictide and lightly doped cuprate | | Cun Ye
; Wei Ruan
; Peng Cai
; Xintong Li
; Aifeng Wang
; Xianhui Chen
; Yayu Wang
; | | Date: |
14 Apr 2015 | | Abstract: | One of the major puzzles regarding unconventional superconductivity is how
some of the most interesting superconductors are related to an insulating phase
that lies in close proximity. Here we report scanning tunneling microscopy
studies of the local electronic structure of Cu doped NaFeAs across the
superconductor to insulator transition. We find that in the highly insulating
regime the electronic spectrum develops an energy gap with diminishing density
of state at the Fermi level. The overall lineshape and strong spatial
variations of the spectra are strikingly similar to that of lightly doped
cuprates close to the parent Mott insulator. We propose that the suppression of
itinerant electron state and strong impurity potential induced by Cu dopants
lead to this insulating iron pnictide. | | Source: | arXiv, 1504.3515 | | Services: | Forum | Review | PDF | Favorites | |
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