Absence of Orbital Currents in Superconducting YBa2Cu4O8 Using a Zeeman-Perturbed Nuclear-Quadrupole-Resonance Technique
S. Strässle, B. Graneli, M. Mali, J. Roos, H. Keller
DOI 10.1103/PhysRevLett.106.097003 · Physical Review Letters
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Abstract
Zeeman perturbed nuclear quadrupole resonance was applied to evaluate weak magnetic fields in the context of orbital currents in cuprate superconductors. The magnetic environment of the barium atom in c-axis oriented powder samples of YBa2Cu4O8 was investigated in the pseudogap phase at 90 K. No evidence for orbital currents was found: any static and dynamic field must be less than 0.07 and 0.7 mT, respectively.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 81 | Pressure not reported | unknown |
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