Oblique Vortex Lattice Implies Unconventional Pairing Symmetry in High Temperature Superconductors |
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Authors: | Shi-Ping Zhou |
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Affiliation: | (1) Department of Physics, Shanghai University, Shanghai, 201800, People's Republic of China |
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Abstract: | The symmetry of order parameters of YBa2Cu3O7 – high temperature superconductor was studied with the Ginzburg–Landau theory. The vortex lattice of a YBa2Cu3O7 superconductor is oblique at a temperature well below the transition temperature Tc, where the mixed s– state is expected to have the lowest energy, whereas very close to Tc, the -wave is slightly lower in energy, and a triangular vortex lattice recovers. The coexistence and the coupling between the s- and d-waves would account for the unusual behaviors such as the upward curvature of the upper critical field curve HC2(T). |
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Keywords: | pairing symmetries Ginzburg– Landau model vortex lattice |
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