Null Orbital Frustration at the Pseudogap Boundary in a Layered Cuprate Superconductor
L. Krusin-Elbaum, T. Shibauchi, C. H. Mielke
DOI 10.1103/PhysRevLett.92.097005 · Physical Review Letters
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Abstract
We assess the relative importance of orbital frustration at the pseudogap closing field Hpg. Using interlayer tunneling transport in pulsed magnetic fields nearly up to 60 T, we track the field-temperature (H-T) phase diagram for fields parallel (∥ab) and normal (∥c) to the layered structure of Bi2Sr2CaCu2O8+y. In contrast to large orientational anisotropy of the superconducting state related to the orbital motion of Cooper pairs, we find anisotropy of Hpg temperature independent and small, due solely to the g factor. The obtained Zeeman relation with the pseudogap temperature T⋆, g∥cμBHpg∥c=g∥abμBHpg∥ab≈kBT⋆, is fully consistent with the correlations only in the spin channel.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 60 | Pressure not reported | unknown |
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