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Title: Strain-induced intervortex interaction and vortex lattices in tetragonal superconductors

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 H c2 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 CeCoIn 5.
Authors:
 [1] ;  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Report Number(s):
IS-J-9318
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1702606
Grant/Contract Number:
AC52-06NA25396; AC02-07CH11358
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 5; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1355897
Alternate Identifier(s):
OSTI ID: 1344587

Lin, Shi -Zeng, and Kogan, Vladimir G. Strain-induced intervortex interaction and vortex lattices in tetragonal superconductors. United States: N. p., Web. doi:10.1103/PhysRevB.95.054511.
Lin, Shi -Zeng, & Kogan, Vladimir G. Strain-induced intervortex interaction and vortex lattices in tetragonal superconductors. United States. doi:10.1103/PhysRevB.95.054511.
Lin, Shi -Zeng, and Kogan, Vladimir G. 2017. "Strain-induced intervortex interaction and vortex lattices in tetragonal superconductors". United States. doi:10.1103/PhysRevB.95.054511. https://www.osti.gov/servlets/purl/1355897.
@article{osti_1355897,
title = {Strain-induced intervortex interaction and vortex lattices in tetragonal superconductors},
author = {Lin, Shi -Zeng and Kogan, Vladimir G.},
abstractNote = {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.},
doi = {10.1103/PhysRevB.95.054511},
journal = {Physical Review B},
number = 5,
volume = 95,
place = {United States},
year = {2017},
month = {2}
}