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The ac Hall effect in high- superconductors

H D Drew, S Wu and H-T S Lihn

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Far-infrared magnetotransmission measurements of normal-state thin films are discussed. The magneto-optical signals observed in circularly polarized light are consistent with the ac Hall effect of holes with a reduced scattering rate and an enhanced mass compared to the zero-field transport parameters. The results agree with a simple high-frequency extension of models which have been developed to explain the anomalous dc Hall effect in the normal state of high- superconductors in terms of two scattering rates. The Hall scattering rate , where and K. These experiments provide new tests of the Fermi-liquid versus non-Fermi-liquid nature of these materials.


PACS

73.50.Jt Galvanomagnetic and other magnetotransport effects (including thermomagnetic effects)

78.20.Ls Magnetooptical effects

74.20.Mn Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc.)

74.25.Fy Transport properties (electric and thermal conductivity, thermoelectric effects, etc.)

74.72.Bk Y-based cuprates

Subjects

Superconductivity

Condensed matter: electrical, magnetic and optical

Surfaces, interfaces and thin films

Dates

Issue 48 (25 November 1996)

Received 3 September 1996



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