Energy landscape and shear modulus of interlayer Josephson vortex systems
Yoshihiko Nonomura, Xiao Hu
DOI 10.1103/PhysRevB.74.024504 · Physical Review B
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Abstract
The ground state of interlayer Josephson vortex systems is investigated on the basis of a simplified Lawrence-Doniach model in which spatial dependence of the magnetic field and the amplitude of the superconducting order parameter is not taken into account. Energy landscape is drawn with respect to the in-plane field, the period of insulating layers including Josephson vortices, and the shift from the aligned vortex lattice. The energy landscape has a multivalley structure and ground-state configurations correspond to bifurcation points of the valleys. In the high-field region, the shear modulus becomes independent of field and its anisotropy dependence is given by c66∝γ−4.
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