vortex ice; Kagomé lattice; scanning Hall microscopy
Abstract :
[en] We investigate the degeneracy of the superconducting vortex matter ground state by directly visualizing the vortex con gurations in a kagomé lattice of elongated antidots via scanning Hall probe microscopy (SHPM). The observed vortex patterns, at specifi c applied magnetic fi elds, are in good agreement with the confi gurations obtained using time-dependent Ginzburg-Landau (TDGL) simulation. Both results indicate that the long range interaction in this nano-structured superconductor is unable to lift degeneracy between different vortex states and the pattern formation is mainly ruled by the nearest neighbour interaction. This simpli cation allows the identi cation of a set of simple rules characterizing the vortex con gurations. We demonstrated that these rules can explain both the observed vortex distributions and the magnetic fi eld dependent degree of degeneracy.
Disciplines :
Physics
Author, co-author :
Xue, Cun; School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an 710072, China
Ge, Jun-Yi; Katholieke Universiteit Leuven - KUL
He, An; College of science, Chang'an University, Xi'an 710064, China
Zharinov, Vyacheslav S.; Katholieke Universiteit Leuven - KUL
Moshchalkov, V.V.; Katholieke Universiteit Leuven - KUL
Zhou, Y.H.; School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, P. R. China
Silhanek, Alejandro ; Université de Liège > Département de physique > Physique expérimentale des matériaux nanostructurés
Van de Vondel, Joris; Katholieke Universiteit Leuven - KUL
Language :
English
Title :
Mapping degenerate vortex states in a kagomé lattice of elongated antidots via scanning Hall probe microscopy
Publication date :
July 2017
Journal title :
Physical Review. B, Condensed Matter
ISSN :
0163-1829
eISSN :
1095-3795
Publisher :
American Institute of Physics, New York, United States - New York
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See Supplemental Material at http://link.aps.org/supplemental/10.1103/PhysRevB.96.024510 for more detailed analysis on the amount of degeneracy at (Equation presented), and (Equation presented).
