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Vortex-lattice symmetry near T-c in YNi2B2C
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UNSPECIFIED (2005) Vortex-lattice symmetry near T-c in YNi2B2C. PHYSICAL REVIEW B, 72 (1). -. doi:10.1103/PhysRevB.72.014542
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Official URL: http://dx.doi.org/10.1103/PhysRevB.72.014542
Abstract
Detailed high-resolution small-angle neutron diffraction measurements have been used to determine the structural phase diagram of the vortex lattice (VL) in YNi2B2C with H parallel to c. At low temperatures (T < T-c) the first-order 45 degrees reorientation transition at a field H-1(T) and second-order rhombic to square transition, H-2(T) have previously been described by the effects of Fermi surface (FS) anisotropy and nonlocality. H-1(T) decreases while H-2(T) increases with increasing temperature. Measurements of the VL structure as close to the upper critical field T-c2(H) as is currently experimentally feasible show no evidence of significant upward curvature or reentrance of H-2 that is expected when thermal fluctuations suppress nonlocality. For fields H-1(T)< H < H-2(T) the VL remains rhombic and shows no sign of becoming hexagonal close to T-c2(H). Our data suggest that an underlying electronic asymmetry, other than FS and nonlocal effects and likely due to an anisotropic superconducting gap, controls the VL structure close to T-c2(H).
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Journal or Publication Title: | PHYSICAL REVIEW B | ||||
| Publisher: | AMERICAN PHYSICAL SOC | ||||
| ISSN: | 1098-0121 | ||||
| Official Date: | July 2005 | ||||
| Dates: |
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| Volume: | 72 | ||||
| Number: | 1 | ||||
| Number of Pages: | 5 | ||||
| Page Range: | - | ||||
| DOI: | 10.1103/PhysRevB.72.014542 | ||||
| Publication Status: | Published |
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