Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 19: Superconductivity: Poster Session
TT 19.13: Poster
Montag, 7. März 2016, 15:00–18:00, Poster D
Measurements of the magnetic vortex lattice in the noncentrosymmetric superconductor Ru7B3 — •Yuliia Tymoshenko1, Alistair Cameron1, Geetha Balakrishnan2, Monica Ciomaga Hatnean2, Don McK. Paul2, and Dmytro Inosov1 — 1Institut für Festkörperphysik, TU Dresden, D-01069 Dresden, Germany — 2Department of Physics, University of Warwick, Coventry, CV47AL, United Kingdom
The noncentrosymmetric (NCS) superconductor Ru7B3 has a hexagonal structure within the [001] plane. NCS superconductors are of significant interest to the condensed matter community, as their crystal structure breaks inversion symmetry, leading to novel superconducting states with unusual properties. Such states associated with NCS superconductors have been predicted to have a significant effect on the vortex lattice (VL) within these materials. We investigated a large single crystal of Ru7B3 by small-angle neutron scattering (SANS). Our goal was to explore the possible influence of the NCS crystal structure on the VL order. During our measurements at the D33 SANS diffractometer at the Laue-Langevin Institute (ILL) in Grenoble, France we clearly observed the formation of VL in Ru7B3. The VL maintains its orientation and remains isotropic within the whole studied field and temperature range, implying a similar degree of isotropy in the SC parameters. An unusual VL rotation with decreasing field at base temperature was seen for field parallel to the (100) direction.