Scanning Tunneling Spectroscopy and Vortex Imaging in the Iron Pnictide Superconductor BaFe1:8Co0:2As2

DSpace/Manakin Repository

Scanning Tunneling Spectroscopy and Vortex Imaging in the Iron Pnictide Superconductor BaFe1:8Co0:2As2

Show simple item record

dc.contributor.author Zech, Martin
dc.contributor.author Chen, X. H.
dc.contributor.author Yin, Yi
dc.contributor.author Williams, Tess L.
dc.contributor.author Wang, W. F.
dc.contributor.author Wu, G.
dc.contributor.author Hoffman, Jennifer
dc.date.accessioned 2009-06-01T19:31:18Z
dc.date.issued 2009
dc.identifier.citation Yin, Yi, Martin Zech, Tess L. Williams, W. F. Wang, G. Wu, X. H. Chen, and Jennifer E. Hoffman. 2009. Physical Review Letters 102(9): 097002. en
dc.identifier.issn 0031-9007 en
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:3009616
dc.description.abstract We present an atomic resolution scanning tunneling spectroscopy study of superconducting BaFe<sub>1.8</sub>Co<sub>0.2</sub>As<sub>2</sub> single crystals in magnetic fields up to 9 T. At zero field, a single gap with coherence peaks at [untranscribable character] = 6:25 meV is observed in the density of states. At 9 and 6 T, we image a disordered vortex lattice, consistent with isotropic, single flux quantum vortices. Vortex locations are uncorrelated with strong-scattering surface impurities, demonstrating bulk pinning. The vortex-induced subgap density of states fits an exponential decay from the vortex center, from which we extract a coherence length [untranscribable character] = 27:6 +/- 2:9 [untranscribable character], corresponding to an upper critical field H<sub>c</sub>2 = 43 T. en
dc.description.sponsorship Physics en
dc.language.iso en_US en
dc.publisher American Physical Society en
dc.relation.isversionof http://dx.doi.org/10.1103/PhysRevLett.102.097002 en
dc.relation.hasversion http://arxiv.org/abs/0810.1048 en
dash.license LAA
dc.title Scanning Tunneling Spectroscopy and Vortex Imaging in the Iron Pnictide Superconductor BaFe1:8Co0:2As2 en
dc.relation.journal Physical Review Letters en
dash.depositing.author Hoffman, Jennifer

Files in this item

Files Size Format View
Yin_ScanningTunellingIronPnictide.pdf 966.4Kb PDF View/Open

This item appears in the following Collection(s)

  • FAS Scholarly Articles [7588]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

Show simple item record

 
 

Search DASH


Advanced Search
 
 

Submitters