Smectic vortex phase in optimally doped YBa2Cu3O7 thin films |
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Authors: | Baily S A Maiorov B Zhou H Balakirev F F Jaime M Foltyn S R Civale L |
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Affiliation: | Superconductivity Technology Center, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA. sbaily@lanl.gov |
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Abstract: | Angular dependent resistivity measurements of optimally doped YBa2Cu3O7 films in fields H pulsed to 50 T are presented. Up to the highest H, the vortex melting field Hm increases and vortex motion is reduced for H aligned with the correlated pinning centers along the main crystalline axes, otherwise 3D anisotropic scaling describes the vortex dynamics. For H parallel ab, the rapid increase in Hm at low temperatures and a critical exponent analysis near Hm confirm the presence of the liquid-crystalline smectic phase predicted for layered superconductors. |
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