Elastic moduli of vortex lattices within nonlocal London model

Abstract

Vortex lattice (VL) elastic response is analyzed within nonlocal London model. The squash modulus turns zero at the field $H_{\square }$ where VL undergoes square-to-rhombus structural transition. In the field region $H>H_{\square }$ where the square VL is stable, the rotation modulus turns zero at a field $H_r$ indicating instability of the square VL with respect to rotations. The shear modulus depends on the shear direction; the dependence is strong in the vicinity of $H_{\square }$ where the square VL is soft with respect to the shear along [110]. The $H$ dependences of elastic moduli are evaluated for LuNi${}_2$B${}_2$C.

4 pages, 2 figures

References in corpus (1)

• Field evolution of vortex lattice in LuNi_2B_2C seen by decoration in fields up to 1.5 kOe

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