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Evidence for a square-square vortex lattice transition in a high-T c cuprate superconductor

Abstract : Using sound velocity and attenuation measurements in high magnetic fields, we identify a new transition in the vortex lattice state of La2−xSrxCuO4 (LSCO). The transition, observed in magnetic fields exceeding 35 T and temperatures far below zero field Tc, is detected in the compression modulus of the vortex lattice, at a doping level x = p = 0.17. Our theoretical analysis based on Eilenberger theory of vortex lattice shows that the transition corresponds to the long-sought 45 • rotation of the square vortex lattice, predicted to occur in d-wave superconductors near a van Hove singularity.
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Preprints, Working Papers, ...
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https://hal.archives-ouvertes.fr/hal-03445700
Contributor : David Le Boeuf Connect in order to contact the contributor
Submitted on : Wednesday, November 24, 2021 - 10:05:20 AM
Last modification on : Sunday, November 28, 2021 - 3:26:51 AM

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2111.11456.pdf
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  • HAL Id : hal-03445700, version 1
  • ARXIV : 2111.11456

Citation

D. J. Campbell, M. Frachet, S. Benhabib, I. Gilmutdinov, C. Proust, et al.. Evidence for a square-square vortex lattice transition in a high-T c cuprate superconductor. 2021. ⟨hal-03445700⟩

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