Elastic moduli of vortex lattices within nonlocal London model - art. no. 137002

Vortex lattice (VL) elastic response is analyzed within the nonlocal London model which hold for high-kappa clean superconductors. The squash modulus vanishes at the field H-square where VL undergoes a square-to-rhombus trans ition. For H > H-square, where the square VL is stable, the rotation modulu s turns zero at H = H-r, indicating VL instability to rotations. The shear modulus depends on the shear direction; the dependence is strong in the vic inity of H-square where the square VL is soft with respect to the shear alo ng [110]. The H dependences of the moduli are evaluated for LuNi2B2C.