Role of antiferromagnetic fluctuations in the temperature dependence of the linewidth of the transitions between the crystal-field levels in high-Tc superconductors

V. L. Aksenov; V. V. Kabanov

doi:10.1103/PhysRevB.49.3524

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Role of antiferromagnetic fluctuations in the temperature dependence of the linewidth of the transitions between the crystal-field levels in high-Tc superconductors

V. L. Aksenov, V. V. Kabanov

DOI 10.1103/PhysRevB.49.3524 · Physical Review B

T1

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Abstract

The measurements of linewidth of the transitions between 4f levels of Tm split by the crystal field in Y-Ba-Cu-O compounds are analyzed using the spin-wave approximation and the phenomenological approach of Millis, Monien, and Pines. It was shown that in the insulating state the main contribution to the linewidth arises from one-magnon processes and a gap in the spectrum of magnetic excitation is rather small (Δ<100 K). In superconducting compounds the main contribution to the linewidth arises from zone-center magnetic fluctuations and the temperature dependence of the linewidth is determined by static spin susceptibility.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Tm0.1Y0.9Ba2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Tm0.1Y0.9Ba2Cu3O6.9 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown