Rotation of the magnetic vortex lattice in Ru7B3 driven by the effects of broken time-reversal and inversion symmetry

We observe a hysteretic reorientation of the magnetic vortex lattice in the noncentrosymmetric superconductor Ru7B3, with the change in orientation driven by altering magnetic field below Tc. Normally a vortex lattice chooses either a single or degenerate set of orientations with respect to a crysta...

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Bibliographic Details
Published in:arXiv.org 2018-10
Main Authors: Cameron, A S, Yerin, Y S, Tymoshenko, Y V, Portnichenko, P Y, Sukhanov, A S, Hatnean, M Ciomaga, Paul, D McK, Balakrishnan, G, Cubitt, R, Inosov, D S
Format: Article
Language:English
Subjects:
Broken symmetry
Crystal lattices
Crystal structure
Magnetic fields
Rotation
Symmetry
Vortices
Online Access:Get full text
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Summary:We observe a hysteretic reorientation of the magnetic vortex lattice in the noncentrosymmetric superconductor Ru7B3, with the change in orientation driven by altering magnetic field below Tc. Normally a vortex lattice chooses either a single or degenerate set of orientations with respect to a crystal lattice at any given field or temperature, a behavior well described by prevailing phenomenological and microscopic theories. Here, in the absence of any typical VL structural transition, we observe a continuous rotation of the vortex lattice which exhibits a pronounced hysteresis and is driven by a change in magnetic field. We propose that this rotation is related to the spontaneous magnetic fields present in the superconducting phase, which are evidenced by the observation of time-reversal symmetry breaking, and the physics of broken inversion symmetry. Finally, we develop a model from the Ginzburg-Landau approach which shows that the coupling of these to the vortex lattice orientation can result in the rotation we observe.
ISSN:2331-8422
DOI:10.48550/arxiv.1810.03876