Direct Probe of Interplay between Local Structure and Superconductivity in FeTe sub(0.55)Se sub(0.45)

The relationship between atomically defined structures and physical properties in functional materials remains a subject of constant interest. We explore the interplay between local crystallographic structure, composition, and local superconductive properties in iron chalcogenide superconductors. Di...

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Published inACS nano Vol. 7; no. 3; pp. 2634 - 2641-2634-2641
Main Authors Lin, Wenzhi, Li, Qing, Sales, Brian C, Jesse, Stephen, Sefat, Athena S, Kalinin, Sergei V, Pan, Minghu
Format Journal Article
LanguageEnglish
Published 06.03.2013
Subjects
Chalcogenides
Constants
Crystal defects
Crystal structure
Distortion
Iron
Physical properties
Superconductivity
Superconductors
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ISSN1936-0851
1936-086X
DOI10.1021/nn400012q

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Summary:The relationship between atomically defined structures and physical properties in functional materials remains a subject of constant interest. We explore the interplay between local crystallographic structure, composition, and local superconductive properties in iron chalcogenide superconductors. Direct structural analysis of scanning tunneling microscopy data allows local lattice distortions and structural defects across an FeTe sub(0.55)Se sub(0.45) surface to be explored on a single unit-cell level. Concurrent superconducting gap (SG) mapping reveals suppression of the SG at well-defined structural defects, identified as a local structural distortion. The strong structural distortion causes the vanishing of the superconducting state. This study provides insight into the origins of superconductivity in iron chalcogenides by providing an example of atomic-level studies of the structure-property relationship.
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ISSN:1936-0851
1936-086X
DOI:10.1021/nn400012q