Evidence for a Square-Square Vortex Lattice Transition in a High-Tc Cuprate Superconductor
D. J. Campbell, M. Frachet, S. Benhabib, I. Gilmutdinov, C. Proust, T. Kurosawa, N. Momono, M. Oda, M. Horio, K. Kramer, J. Chang, M. Ichioka, D. LeBoeuf
DOI 10.1103/PhysRevLett.129.067001 · Physical Review Letters
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Abstract
Using sound velocity and attenuation measurements in high magnetic fields, we identify a new transition in the vortex lattice state of La2−xSrxCuO4. 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 of x=p=0.17. Our theoretical analysis based on Eilenberger’s theory of the 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38 | Pressure not reported | unknown |
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