Scanning Tunneling Spectroscopy and Vortex Imaging in the Iron Pnictide Superconductor BaFe1:8Co0:2As2
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| dc.contributor.author |
Zech, Martin |
|
| dc.contributor.author |
Chen, X. H. |
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| dc.contributor.author |
Yin, Yi |
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| dc.contributor.author |
Williams, Tess L. |
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| dc.contributor.author |
Wang, W. F. |
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| dc.contributor.author |
Wu, G. |
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| dc.contributor.author |
Hoffman, Jennifer
|
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| dc.date.accessioned |
2009-06-01T19:31:18Z |
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| dc.date.issued |
2009 |
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| 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. |
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| dc.identifier.issn |
0031-9007 |
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| dc.identifier.uri |
http://nrs.harvard.edu/urn-3:HUL.InstRepos:3009616 |
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| 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. |
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| dc.description.sponsorship |
Physics |
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| dc.language.iso |
en_US |
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| dc.publisher |
American Physical Society |
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| dc.relation.isversionof |
http://dx.doi.org/10.1103/PhysRevLett.102.097002 |
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| dc.relation.hasversion |
http://arxiv.org/abs/0810.1048 |
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| 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
|
|
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FAS Scholarly Articles [5137]
Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
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