Temperature dependence of the dynamic susceptibility χ’’(ω) in superconducting YBa2Cu3O6.6 (Tc=53 K)
B. J. Sternlieb, G. Shirane, J. M. Tranquada, M. Sato, S. Shamoto
DOI 10.1103/PhysRevB.47.5320 · Physical Review B
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Abstract
Temperature-dependent neutron-scattering measurements of the dynamic susceptibility χ’’(ω) in single-crystal YBa2Cu3O6.6 (Tc=53 K) are reported. At high temperatures (T≳100 K) a universal dependence of χ’’(ω) on the ratio ω/T has been observed. A spin pseudogap ωg≃10 meV results in a breakdown in this behavior at temperatures well above Tc. Below ∼40 K the scattering intensities at energy transfers of ΔE=5 and 8 meV demonstrate a surprising recovery with decreasing temperature. The behavior of χ’’(ω) over the range of energies (3–16 meV) and temperatures (1.5–300 K) studied presents a strong constraint on theoretical descriptions of YBa2Cu3O6+x.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O6.6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 53 | Pressure not reported | onset |
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