Vortex lattice of highly anisotropic layered superconductors in strong, parallel magnetic fields

L. Bulaevskii; John R. Clem

doi:10.1103/PhysRevB.44.10234

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Vortex lattice of highly anisotropic layered superconductors in strong, parallel magnetic fields

L. Bulaevskii, John R. Clem

DOI 10.1103/PhysRevB.44.10234 · Physical Review B

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Abstract

The equations for the gauge-invariant phases obtained in the framework of the Lawrence-Doniach model are used to study the vortex lattice in layered superconductors in strong, parallel magnetic fields H. As H changes, a sequence of first-order phase transitions occurs between the lattices with different periods. The largest jumps in magnetization, of order Hc1, occur at fields of order H0=φ0/γs2, where φ0 is the flux quantum, s is the interlayer spacing, and γ is the anisotropy (γ=λc/λab, where λc and λab are the penetration depths for currents perpendicular and parallel to the layers, respectively). The asymptotic dependence of the magnetization M at high fields H≫H0 is M∝H−3.