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  Vortex imaging and vortex lattice transitions in superconducting Sr2RuO4 single crystals

Curran, P. J., Khotkevych, V. V., Bending, S. J., Gibbs, A. S., Lee, S. L., & Mackenzie, A. P. (2011). Vortex imaging and vortex lattice transitions in superconducting Sr2RuO4 single crystals. Physical Review B, 84(10): 104507, pp. 1-8. doi:10.1103/PhysRevB.84.104507.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-F29D-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-F29F-2
Genre: Journal Article

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 Creators:
Curran, P. J.1, Author
Khotkevych, V. V.1, Author
Bending, S. J.1, Author
Gibbs, A. S.1, Author
Lee, S. L.1, Author
Mackenzie, A. P.2, Author              
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1external, ou_persistent22              
2External Organizations, ou_persistent22              

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 Abstract: Scanning Hall probe microscopy has been used to study vortex structures in very-high-quality single crystals of the unconventional superconductor Sr2RuO4 (T-c congruent to 1.5 K). In none of our samples do we find credible evidence for the existence of the spontaneous fields or chiral domains predicted for the expected time-reversal symmetry-breaking order parameter. Even in our highest-quality samples we observe very strong vortex pinning and anomalous broadening of vortex profiles. The best samples also exhibit a clear field-driven triangular to square vortex lattice transition at low fields, as predicted by extended London theory calculations. In stark contrast, slightly less well-ordered samples exhibit pronounced vortex chaining/banding that we tentatively attribute to an extrinsic source of disorder.

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 Dates: 2011-09-08
 Publication Status: Published in print
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Title: Physical Review B
  Other : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 84 (10) Sequence Number: 104507 Start / End Page: 1 - 8 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008