The Hall effect in Zn-doped YBa_{2}Cu_{3}O_{7-δ} revisited: Hall angle and the pseudogap

Details The Hall effect in Zn-doped YBa_{2}Cu_{3}O_{7-δ} revisited: Hall angle and the pseudogap The Hall effect in Zn-doped YBa_{2}Cu_{3}O_{7-δ} revisited: Hall angle and the pseudogap

1999-05-19

arxiv.org/abs/cond-mat/9905274v2

Phys. Rev. B 60, R15055 - R15058 (1999)

Physics

Condensed Matter

Superconductivity

4 pages including 4 eps figures, final version published in Phys. Rev. B, Rapid Communications

Scientific paper

10.1103/PhysRevB.60.R15055

The temperature dependence of the Hall coefficient is measured with a high accuracy in a series of Zn-doped YBCO_{6.78} crystals with the Zn concentration from 0% to 1.3%. We found that the cotangent of the Hall angle, cot(\theta_H), starts to deviate upward from the T^2 dependence below T_0 (which is roughly 130 K), regardless of the Zn concentration. We discuss that this deviation is caused by the pseudogap; the direction of the deviation and its insensitivity to the Zn doping suggest that the pseudogap affects cot(\theta_H) through a change in the effective mass, rather than through a change in the Hall scattering rate.

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