Strain-induced intervortex interaction and vortex lattices in tetragonal superconductors
Journal Article
·
· Physical Review B
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
In superconductors with strong coupling between superconductivity and elasticity manifested in a strong dependence of transition temperature on pressure, there is an additional contribution to intervortex interactions due to the strain field generated by vortices. When vortex lines are along the c axis of a tetragonal crystal, a square vortex lattice (VL) is favored at low vortex densities, because the vortex-induced strains contribution to the intervortex interactions is long range. At intermediate magnetic fields, the triangular lattice is stabilized. Furthermore, the triangular lattice evolves to the square lattice upon increasing magnetic field, and eventually the system locks to the square structure. We argue, however, that as magnetic field approaches the upper critical field Hc2 the elastic intervortex interactions disappear faster than the standard London interactions, so that VL should return to the triangular structure. Our results are compared to VLs observed in the heavy fermion superconductor CeCoIn5.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-07CH11358; AC52-06NA25396
- OSTI ID:
- 1355897
- Alternate ID(s):
- OSTI ID: 1344587
- Report Number(s):
- IS-J--9318
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 5 Vol. 95; ISSN 2469-9950; ISSN PRBMDO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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